{
"metadata": {
"language": "Julia",
"name": ""
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"#4. PLEAC Julia: Arrays\n",
"\n",
"[PLEAC = Language Examples Alike Cookbook](http://pleac.sourceforge.net/)\n",
"PLEAC examples are drawn from the \"Perl Cookbook\" by Tom Christiansen & Nathan Torkington, published by O'Reilly. They provide a nice range of examples oriented toward data munging, the type of work I tend to want to do first when learning a new language.\n",
"\n",
"\n",
"The Julia examples below are principally translations from the [Python version](http://pleac.sourceforge.net/pleac_python/)\n",
"\n",
"###Caution\n",
"I'm learning as I go, so the code below probably doesn't represent best practice. Your suggestions are welcome! \n",
"Please file an issue or make a pull request to the [github repo](https://github.com/catawbasam/IJulia_PLEAC/).\n",
"\n",
"The examples are not complete. Missing items are generally noted in comments. "
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"###PLEAC 4.1: Introduction\n",
"\n",
"Julia provides 2 major types of Arrays, typed arrays and arrays of Any (aka cell arrays). Cell arrays can contain arbitrary types, including nested arrays. Typed arrays are automatically flattened."
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"non_nested = [\"this\", \"that\", \"the\", \"other\"]'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 1,
"text": [
"1x4 Array{ASCIIString,2}:\n",
" \"this\" \"that\" \"the\" \"other\""
]
}
],
"prompt_number": 1
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"nested_typed = [\"this\", \"that\", [\"the\", \"other\"]]'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 2,
"text": [
"1x4 Array{ASCIIString,2}:\n",
" \"this\" \"that\" \"the\" \"other\""
]
}
],
"prompt_number": 2
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"nested_cell = {\"this\", \"that\", [\"the\", \"other\"]}'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 3,
"text": [
"1x3 Array{Any,2}:\n",
" \"this\" \"that\" [\"the\",\"other\"]"
]
}
],
"prompt_number": 3
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"tune = [\"The\", \"Star-Spangled\", \"Banner\"]'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 4,
"text": [
"1x3 Array{ASCIIString,2}:\n",
" \"The\" \"Star-Spangled\" \"Banner\""
]
}
],
"prompt_number": 4
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"Vector[1,4,6]"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n"
]
},
{
"output_type": "stream",
"stream": "stderr",
"text": [
"WARNING: "
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n"
]
},
{
"ename": "LoadError",
"evalue": "no method convert(Type{Array{T,1}},Int64)\nat In[5]:1",
"output_type": "pyerr",
"traceback": [
"no method convert(Type{Array{T,1}},Int64)\nat In[5]:1",
" in setindex! at array.jl:412",
" in getindex at array.jl:153"
]
}
],
"prompt_number": 5
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"###PLEAC 4.2 Specifying an array in your program"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"a = [\"quick\", \"brown\", \"fox\"]'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stderr",
"text": [
"backtraces on your platform are often misleading or partially incorrect\n"
]
},
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 6,
"text": [
"1x3 Array{ASCIIString,2}:\n",
" \"quick\" \"brown\" \"fox\""
]
}
],
"prompt_number": 6
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"a = split(\"Why are you teasing me?\")'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 7,
"text": [
"1x5 Array{String,2}:\n",
" \"Why\" \"are\" \"you\" \"teasing\" \"me?\""
]
}
],
"prompt_number": 7
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"text = \"\"\"\n",
" The boy stood on the burning deck,\n",
" It was as hot as glass.\n",
"\"\"\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 8,
"text": [
"\" The boy stood on the burning deck,\\n It was as hot as glass.\\n\""
]
}
],
"prompt_number": 8
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"lines = [strip(l) for l in split(strip(text),'\\n')]"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 9,
"text": [
"2-element Array{Any,1}:\n",
" \"The boy stood on the burning deck,\"\n",
" \"It was as hot as glass.\" "
]
}
],
"prompt_number": 9
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"sio = IOBuffer(text) # using iobuffer rather than file here"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 10,
"text": [
"IOBuffer([0x20,0x20,0x20,0x20,0x54,0x68,0x65,0x20,0x62,0x6f \u2026 0x61,0x73,0x20,0x67,0x6c,0x61,0x73,0x73,0x2e,0x0a],true,false,true,false,67,9223372036854775807,1)"
]
}
],
"prompt_number": 10
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"tl=readlines(sio)\n",
"sl=[strip(l) for l in tl]"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 11,
"text": [
"2-element Array{Any,1}:\n",
" \"The boy stood on the burning deck,\"\n",
" \"It was as hot as glass.\" "
]
}
],
"prompt_number": 11
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"close(sio)"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 12
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"banner = \"The Mines of Moria\"\n",
"#no single quoted strings in Julia\n",
"name = \"Gandalf\"\n",
"banner = \"Speak,$name and enter!\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 13,
"text": [
"\"Speak,Gandalf and enter!\""
]
}
],
"prompt_number": 13
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"@sprintf(\"Speak, %s, and welcome!\", name)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 14,
"text": [
"\"Speak, Gandalf, and welcome!\""
]
}
],
"prompt_number": 14
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"his_host = \"www.julialang.org\"\n",
"getaddrinfo(his_host)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 15,
"text": [
"ip\"204.232.175.78\""
]
}
],
"prompt_number": 15
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"julia_info=getpid() # Julia's process id"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 16,
"text": [
"8872"
]
}
],
"prompt_number": 16
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#shell_info\n",
";tasklist "
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\r\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Image Name PID Session Name Session# Mem Usage\r\n",
"========================= ======== ================ =========== ============\r\n",
"System Idle Process 0 Services 0 24 K\r\n",
"System 4 Services 0 6,280 K\r\n",
"smss.exe 388 Services 0 712 K\r\n",
"csrss.exe 488 Services 0 4,000 K\r\n",
"wininit.exe 572 Services 0 1,396 K\r\n",
"csrss.exe 584 Console 1 61,912 K\r\n",
"winlogon.exe 636 Console 1 3,344 K\r\n",
"services.exe 656 Services 0 14,328 K\r\n",
"lsass.exe 684 Services 0 20,524 K\r\n",
"lsm.exe 692 Services 0 4,432 K\r\n",
"svchost.exe 788 Services 0 7,176 K\r\n",
"svchost.exe 864 Services 0 14,076 K\r\n",
"svchost.exe 948 Services 0 20,464 K\r\n",
"svchost.exe 980 Services 0 18,604 K\r\n",
"svchost.exe 1012 Services 0 25,360 K\r\n",
"svchost.exe 156 Services 0 48,920 K\r\n",
"stacsv64.exe 496 Services 0 5,956 K\r\n",
"svchost.exe 1092 Services 0 8,680 K\r\n",
"Prot_srv.exe 1236 Services 0 17,756 K\r\n",
"vpnagent.exe 1388 Services 0 9,880 K\r\n",
"svchost.exe 1432 Services 0 27,468 K\r\n",
"EvtEng.exe 1524 Services 0 5,824 K\r\n",
"ZCfgSvc7.exe 1628 Services 0 5,064 K\r\n",
"spoolsv.exe 1704 Services 0 29,176 K\r\n",
"ac.sharedstore.exe 1732 Services 0 3,580 K\r\n",
"HostControlService.exe 1768 Services 0 2,380 K\r\n",
"acevents.exe 1776 Services 0 4,480 K\r\n",
"HostStorageService.exe 1800 Services 0 2,208 K\r\n",
"svchost.exe 1824 Services 0 8,472 K\r\n",
"svchost.exe 1864 Services 0 10,972 K\r\n",
"armsvc.exe 1968 Services 0 1,900 K\r\n",
"AESTSr64.exe 1992 Services 0 1,384 K\r\n",
"AeXNSAgent.exe 2020 Services 0 9,188 K\r\n",
"AgentService.exe 1964 Services 0 27,192 K\r\n",
"unsecapp.exe 2084 Services 0 2,176 K\r\n",
"WmiPrvSE.exe 2160 Services 0 5,884 K\r\n",
"svchost.exe 2264 Services 0 5,972 K\r\n",
"svchost.exe 2296 Services 0 3,040 K\r\n",
"LGVL600SVC.exe 2428 Services 0 2,148 K\r\n",
"schsvc.exe 2560 Services 0 51,532 K\r\n",
"sqlservr.exe 2672 Services 0 35,500 K\r\n",
"o2flash.exe 2724 Services 0 2,752 K\r\n",
"srvany.exe 2768 Services 0 1,324 K\r\n",
"SDIOAssist.exe 2844 Services 0 3,008 K\r\n",
"PDFProFiltSrvPP.exe 2964 Services 0 1,724 K\r\n",
"pstartSr.exe 3028 Services 0 2,052 K\r\n",
"pg_ctl.exe 3068 Services 0 1,900 K\r\n",
"radexecd.exe 1280 Services 0 2,920 K\r\n",
"radstgms.exe 2580 Services 0 2,600 K\r\n",
"RegSrvc.exe 3080 Services 0 2,420 K\r\n",
"postgres.exe 3088 Services 0 36,292 K\r\n",
"conhost.exe 3096 Services 0 1,116 K\r\n",
"upeksvr.exe 3148 Console 1 7,112 K\r\n",
"ccSvcHst.exe 3156 Services 0 20,884 K\r\n",
"sqlwriter.exe 3240 Services 0 8,616 K\r\n",
"postgres.exe 3272 Services 0 1,848 K\r\n",
"svchost.exe 3280 Services 0 19,088 K\r\n",
"tvnserver.exe 3412 Services 0 2,908 K\r\n",
"svchost.exe 3452 Services 0 4,444 K\r\n",
"postgres.exe 3464 Services 0 1,752 K\r\n",
"postgres.exe 3472 Services 0 3,292 K\r\n",
"postgres.exe 3488 Services 0 1,676 K\r\n",
"postgres.exe 3500 Services 0 2,552 K\r\n",
"postgres.exe 3516 Services 0 1,940 K\r\n",
"WLIDSVC.EXE 3540 Services 0 5,852 K\r\n",
"WLIDSVCM.EXE 3816 Services 0 1,292 K\r\n",
"taskhost.exe 4128 Console 1 7,996 K\r\n",
"ccSvcHst.exe 4148 Console 1 5,256 K\r\n",
"dwm.exe 4436 Console 1 3,764 K\r\n",
"explorer.exe 4508 Console 1 109,804 K\r\n",
"acevents.exe 4864 Console 1 5,556 K\r\n",
"accrdsub.exe 4984 Console 1 7,324 K\r\n",
"Smc.exe 5016 Services 0 20,564 K\r\n",
"Apoint.exe 5088 Console 1 5,280 K\r\n",
"iFrmewrk.exe 5140 Console 1 7,316 K\r\n",
"sttray64.exe 5148 Console 1 5,648 K\r\n",
"FF_Protection.exe 5256 Console 1 3,104 K\r\n",
"tvnserver.exe 5268 Console 1 2,464 K\r\n",
"MSOSYNC.EXE 5320 Console 1 7,928 K\r\n",
"ISUSPM.exe 5352 Console 1 8,496 K\r\n",
"acsagent.exe 5400 Console 1 5,944 K\r\n",
"ONENOTEM.EXE 5428 Console 1 1,120 K\r\n",
"RoxioBurnLauncher.exe 5588 Console 1 4,944 K\r\n",
"PDVD9Serv.exe 5612 Console 1 2,224 K\r\n",
"svchost.exe 5700 Services 0 3,244 K\r\n",
"AeXNSAgentHostSurrogate32 5740 Services 0 12,108 K\r\n",
"IAStorIcon.exe 5924 Console 1 11,648 K\r\n",
"WUDFHost.exe 6084 Services 0 2,288 K\r\n",
"schTray.exe 5296 Console 1 21,084 K\r\n",
"cptray.exe 5640 Console 1 2,608 K\r\n",
"ApMsgFwd.exe 6244 Console 1 1,852 K\r\n",
"ApntEx.exe 6436 Console 1 3,332 K\r\n",
"hidfind.exe 6448 Console 1 2,156 K\r\n",
"conhost.exe 6480 Console 1 2,196 K\r\n",
"P95tray.exe 6536 Console 1 3,828 K\r\n",
"unsecapp.exe 6580 Console 1 3,272 K\r\n",
"Agent.exe 6716 Console 1 270,748 K\r\n",
"AeXAgentUIHost.exe 6852 Console 1 4,596 K\r\n",
"pptd40nt.exe 6956 Console 1 2,456 K\r\n",
"pdfPro5Hook.exe 6972 Console 1 2,120 K\r\n",
"SearchIndexer.exe 1312 Services 0 75,824 K\r\n",
"BrStMonW.exe 6048 Console 1 231,044 K\r\n",
"BrCtrlCntr.exe 6732 Console 1 1,944 K\r\n",
"vpnui.exe 6676 Console 1 16,980 K\r\n",
"BrYNSvc.exe 6684 Services 0 5,012 K\r\n",
"communicator.exe 7028 Console 1 87,976 K\r\n",
"EMET_Agent.exe 7044 Console 1 17,692 K\r\n",
"BrCcUxSys.exe 7328 Console 1 2,200 K\r\n",
"PrivacyIconClient.exe 8584 Console 1 24,968 K\r\n",
"LMS.exe 8620 Services 0 3,792 K\r\n",
"UNS.exe 8644 Services 0 9,708 K\r\n",
"UcMapi.exe 8844 Console 1 41,736 K\r\n",
"IAStorDataMgrSvc.exe 4924 Services 0 9,396 K\r\n",
"OSPPSVC.EXE 2660 Services 0 10,696 K\r\n",
"wmpnetwk.exe 11340 Services 0 11,668 K\r\n",
"ielowutil.exe 1040 Console 1 1,256 K\r\n",
"TGitCache.exe 5408 Console 1 15,512 K\r\n",
"chrome.exe 11416 Console 1 765,144 K\r\n",
"chrome.exe 9876 Console 1 106,112 K\r\n",
"splwow64.exe 9096 Console 1 19,604 K\r\n",
"JuniperSetupClient.exe 13044 Console 1 16,564 K\r\n",
"svchost.exe 1820 Services 0 5,336 K\r\n",
"notepad++.exe 10576 Console 1 39,184 K\r\n",
"WmiPrvSE.exe 1556 Services 0 32,232 K\r\n",
"chrome.exe 5912 Console 1 11,268 K\r\n",
"ssh-agent.exe 7040 Console 1 4,876 K\r\n",
"SearchProtocolHost.exe 12760 Services 0 11,216 K\r\n",
"WINWORD.EXE 14156 Console 1 139,064 K\r\n",
"chrome.exe 6904 Console 1 106,924 K\r\n",
"chrome.exe 13828 Console 1 43,144 K\r\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"chrome.exe 9188 Console 1 46,628 K\r\n",
"chrome.exe 12196 Console 1 51,828 K\r\n",
"chrome.exe 10204 Console 1 44,560 K\r\n",
"chrome.exe 1960 Console 1 64,488 K\r\n",
"WmiPrvSE.exe 10480 Services 0 21,892 K\r\n",
"svchost.exe 5764 Services 0 5,940 K\r\n",
"chrome.exe 7944 Console 1 56,768 K\r\n",
"OUTLOOK.EXE 8352 Console 1 193,008 K\r\n",
"python.exe 9048 Console 1 64,496 K\r\n",
"conhost.exe 10516 Console 1 8,844 K\r\n",
"chrome.exe 8100 Console 1 78,688 K\r\n",
"cmd.exe 7372 Console 1 3,616 K\r\n",
"julia-readline.exe 8516 Console 1 287,812 K\r\n",
"cmd.exe 12060 Console 1 3,616 K\r\n",
"julia-readline.exe 8272 Console 1 150,012 K\r\n",
"cmd.exe 12936 Console 1 3,448 K\r\n",
"conhost.exe 5728 Console 1 8,840 K\r\n",
"w3wp.exe 4496 Services 0 13,312 K\r\n",
"taskeng.exe 12728 Services 0 5,724 K\r\n",
"taskeng.exe 8224 Console 1 7,284 K\r\n",
"cmd.exe 11232 Console 1 3,656 K\r\n",
"julia-readline.exe 8872 Console 1 284,336 K\r\n",
"chrome.exe 12464 Console 1 56,476 K\r\n",
"radsched.exe 8148 Services 0 5,512 K\r\n",
"SearchFilterHost.exe 4516 Services 0 7,292 K\r\n",
"tasklist.exe 7496 Console 1 6,704 K\r\n"
]
}
],
"prompt_number": 17
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"banner = [\"Costs\", \"only\", \"$4.95\"]' # $ stripped due to substitution"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 18,
"text": [
"1x3 Array{ASCIIString,2}:\n",
" \"Costs\" \"only\" \"4.95\""
]
}
],
"prompt_number": 18
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"banner = [\"Costs\", \"only\", \"\\$4.95\"]'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 19,
"text": [
"1x3 Array{ASCIIString,2}:\n",
" \"Costs\" \"only\" \"\\$4.95\""
]
}
],
"prompt_number": 19
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"print(banner[3])"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"$4.95"
]
}
],
"prompt_number": 20
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"banner = split(\"Costs only \\$4.95\")'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 21,
"text": [
"1x3 Array{String,2}:\n",
" \"Costs\" \"only\" \"\\$4.95\""
]
}
],
"prompt_number": 21
},
{
"cell_type": "code",
"collapsed": false,
"input": [
" brax=split(\"\"\" ' \" ( ) < > { } [ ] \"\"\")'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 22,
"text": [
"1x10 Array{String,2}:\n",
" \"'\" \"\\\"\" \"(\" \")\" \"<\" \">\" \"{\" \"}\" \"[\" \"]\""
]
}
],
"prompt_number": 22
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# no ''' in Julia"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 23
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"tags = split(\"LI TABLE TR TD A IMG H1 P\")'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 24,
"text": [
"1x8 Array{String,2}:\n",
" \"LI\" \"TABLE\" \"TR\" \"TD\" \"A\" \"IMG\" \"H1\" \"P\""
]
}
],
"prompt_number": 24
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"sample = split(\"The backslash (\\\\) is often used in regular expressions.\")'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 25,
"text": [
"1x9 Array{String,2}:\n",
" \"The\" \"backslash\" \"(\\\\)\" \"is\" \u2026 \"in\" \"regular\" \"expressions.\""
]
}
],
"prompt_number": 25
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Julia uses Unicode by default, so no string qualifier is required\n",
"ships = \"Ni\u00f1a Pinta Santa Mar\u00eda\"\n",
"split(ships)'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 26,
"text": [
"1x4 Array{String,2}:\n",
" \"Ni\u00f1a\" \"Pinta\" \"Santa\" \"Mar\u00eda\""
]
}
],
"prompt_number": 26
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"ships = [\"Ni\u00f1a\", \"Pinta\", \"Santa Mar\u00eda\"]"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 27,
"text": [
"3-element Array{UTF8String,1}:\n",
" \"Ni\u00f1a\" \n",
" \"Pinta\" \n",
" \"Santa Mar\u00eda\""
]
}
],
"prompt_number": 27
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"###PLEAC 4.3: Printing a list with commas"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"js=join(ships,\", \")\n",
"js= length(ships)>1? replace(js,\", \"*ships[end], \" and \"*ships[end]) : js"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 28,
"text": [
"\"Ni\u00f1a, Pinta and Santa Mar\u00eda\""
]
}
],
"prompt_number": 28
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"function commify_series(arr::Array)\n",
" js=join(arr,\", \")\n",
" js=length(arr)>1? replace(js,\", \"*arr[end], \" and \"*arr[end]) : js\n",
"end"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 29,
"text": [
"commify_series (generic function with 1 method)"
]
}
],
"prompt_number": 29
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"commify_series([])"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 30,
"text": [
"\"\""
]
}
],
"prompt_number": 30
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"commify_series([\"red\"])"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 31,
"text": [
"\"red\""
]
}
],
"prompt_number": 31
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"commify_series([\"red\",\"yellow\"]) "
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 32,
"text": [
"\"red and yellow\""
]
}
],
"prompt_number": 32
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"commify_series([\"red\",\"yellow\",\"green\"])"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 33,
"text": [
"\"red, yellow and green\""
]
}
],
"prompt_number": 33
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"myarray = [\"red\",\"yellow\",\"green\"]'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 34,
"text": [
"1x3 Array{ASCIIString,2}:\n",
" \"red\" \"yellow\" \"green\""
]
}
],
"prompt_number": 34
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"println( \"I have [$(join(myarray,\", \"))] marbles.\" )"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"I have [red, yellow, green] marbles."
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n"
]
}
],
"prompt_number": 35
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"println( \"I have \" * join(myarray,' ') * \" marbles.\" )"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"I have red yellow green marbles."
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n"
]
}
],
"prompt_number": 36
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# commify_series - show proper comma insertion in list output\n",
"data = {\n",
" ( \"just one thing\", ),\n",
" ( split(\"Mutt Jeff\") ),\n",
" ( split(\"Peter Paul Mary\") ),\n",
" ( \"To our parents\", \"Mother Theresa\", \"God\" ),\n",
" ( \"pastrami\", \"ham and cheese\", \"peanut butter and jelly\", \"tuna\" ),\n",
" ( \"recycle tired, old phrases\", \"ponder big, happy thoughts\" ),\n",
" ( \"recycle tired, old phrases\", \"ponder big, happy thoughts\", \"sleep and dream peacefully\" ),\n",
" }"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 37,
"text": [
"7-element Array{Any,1}:\n",
" (\"just one thing\",) \n",
" [\"Mutt\",\"Jeff\"] \n",
" [\"Peter\",\"Paul\",\"Mary\"] \n",
" (\"To our parents\",\"Mother Theresa\",\"God\") \n",
" (\"pastrami\",\"ham and cheese\",\"peanut butter and jelly\",\"tuna\") \n",
" (\"recycle tired, old phrases\",\"ponder big, happy thoughts\") \n",
" (\"recycle tired, old phrases\",\"ponder big, happy thoughts\",\"sleep and dream peacefully\")"
]
}
],
"prompt_number": 37
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"typeof(data)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 38,
"text": [
"Array{Any,1}"
]
}
],
"prompt_number": 38
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"function commify_sep(terms::Array)\n",
" sep=\", \"\n",
" for term in terms\n",
" if \",\" in term\n",
" sep = \"; \"\n",
" end\n",
" end \n",
" return sep\n",
"end"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 39,
"text": [
"commify_sep (generic function with 1 method)"
]
}
],
"prompt_number": 39
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"for item in data\n",
" #println(item)\n",
" println(\"$(commify_sep(item)).\")\n",
"end"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n"
]
},
{
"ename": "LoadError",
"evalue": "no method commify_sep((ASCIIString,),)\nat In[40]:4",
"output_type": "pyerr",
"traceback": [
"no method commify_sep((ASCIIString,),)\nat In[40]:4",
" in anonymous at no file:3"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n"
]
}
],
"prompt_number": 40
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"function commify_series3(terms)\n",
" sep = commify_sep(terms)\n",
" n=length(terms)\n",
" if n==0\n",
" return \"\"\n",
" elseif n==1\n",
" return terms[1]\n",
" elseif n==2\n",
" return \"$(terms[1]) and $(terms[2])\"\n",
" else\n",
" return \"$(join(terms[1:end-1],sep))$(sep)and $(terms[end])\"\n",
" end\n",
"end"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 41,
"text": [
"commify_series3 (generic function with 1 method)"
]
}
],
"prompt_number": 41
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"for item in data\n",
" println(\"The list is: $(commify_series3(item)).\")\n",
"end"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n"
]
},
{
"ename": "LoadError",
"evalue": "no method commify_sep((ASCIIString,),)\nat In[42]:3",
"output_type": "pyerr",
"traceback": [
"no method commify_sep((ASCIIString,),)\nat In[42]:3",
" in commify_series3 at In[41]:2"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n"
]
}
],
"prompt_number": 42
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"###PLEAC 4.4: Changing Array Size"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"a = Array(Int,5)'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 43,
"text": [
"1x5 Array{Int64,2}:\n",
" 57451264 62701552 74991088 67816400 74991280"
]
}
],
"prompt_number": 43
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#resize via assignment\n",
"mysize=3\n",
"a = a[1:mysize]\n",
"a'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 44,
"text": [
"1x3 Array{Int64,2}:\n",
" 57451264 62701552 74991088"
]
}
],
"prompt_number": 44
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"####methods that change an object in-place usually end with !"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# To add an element to the end of a list, use the push! method:\n",
"push!(a,4)\n",
"a'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 45,
"text": [
"1x4 Array{Int64,2}:\n",
" 57451264 62701552 74991088 4"
]
}
],
"prompt_number": 45
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# To insert an element, use the insert! method:\n",
"insert!(a,1,10)\n",
"a'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 46,
"text": [
"1x5 Array{Int64,2}:\n",
" 10 57451264 62701552 74991088 4"
]
}
],
"prompt_number": 46
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# To append one list with the contents of another, use the append! method\n",
"a2 = [ 1,2,3 ]\n",
"append!(a,a2)\n",
"a'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 47,
"text": [
"1x8 Array{Int64,2}:\n",
" 10 57451264 62701552 74991088 4 1 2 3"
]
}
],
"prompt_number": 47
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# To insert the contents of one list into another, overwriting zero or \n",
"# more elements, specify a slice\n",
"a[2:4] = a2\n",
"a'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 48,
"text": [
"1x8 Array{Int64,2}:\n",
" 10 1 2 3 4 1 2 3"
]
}
],
"prompt_number": 48
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"a[1]=0\n",
"a[2]=8\n",
"a'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 49,
"text": [
"1x8 Array{Int64,2}:\n",
" 0 8 2 3 4 1 2 3"
]
}
],
"prompt_number": 49
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# To remove one element from the middle of a list\n",
"splice!(a,2)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 50,
"text": [
"8"
]
}
],
"prompt_number": 50
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"a'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 51,
"text": [
"1x7 Array{Int64,2}:\n",
" 0 2 3 4 1 2 3"
]
}
],
"prompt_number": 51
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# To remove elements from the middle of a list:\n",
"splice!(a,3:5)'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 52,
"text": [
"1x3 Array{Int64,2}:\n",
" 3 4 1"
]
}
],
"prompt_number": 52
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"a'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 53,
"text": [
"1x4 Array{Int64,2}:\n",
" 0 2 2 3"
]
}
],
"prompt_number": 53
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"function what_about_that_array(terms)\n",
" println( \"The list now has $(length(terms)) elements.\")\n",
" println( \"The index of the last element is $(length(terms))\" )\n",
" println( \"Element #3 is $(terms[3])\" )\n",
"end"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 54,
"text": [
"what_about_that_array (generic function with 1 method)"
]
}
],
"prompt_number": 54
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"what_about_that_array(a)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The list now has 4 elements."
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
"The index of the last element is 4\n",
"Element #3 is 2\n"
]
}
],
"prompt_number": 55
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"terms=a\n",
"println( \"The index of the last element is $(length(terms))\" )\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The index of the last element is 4"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n"
]
}
],
"prompt_number": 56
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"people = split(\"Crosby Stills Nash Young\")"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 57,
"text": [
"4-element Array{String,1}:\n",
" \"Crosby\"\n",
" \"Stills\"\n",
" \"Nash\" \n",
" \"Young\" "
]
}
],
"prompt_number": 57
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"what_about_that_array(people)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The list now has 4 elements."
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
"The index of the last element is 4\n",
"Element #3 is Nash\n"
]
}
],
"prompt_number": 58
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"pop!(people)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 59,
"text": [
"\"Young\""
]
}
],
"prompt_number": 59
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"what_about_that_array(people)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The list now has 3 elements."
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
"The index of the last element is 3\n",
"Element #3 is Nash\n"
]
}
],
"prompt_number": 60
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"sz=10000-length(people)\n",
"xtra=[None for i in 1:sz ];"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 60
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"append!(people, xtra);"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n"
]
},
{
"ename": "LoadError",
"evalue": "no method convert(Type{String},UnionType)\nat In[60]:1",
"output_type": "pyerr",
"traceback": [
"no method convert(Type{String},UnionType)\nat In[60]:1",
" in copy! at abstractarray.jl:230"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n"
]
}
],
"prompt_number": 60
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"###PLEAC 4.5 Doing something with every element in an array"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"myarray"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 61,
"text": [
"1x3 Array{ASCIIString,2}:\n",
" \"red\" \"yellow\" \"green\""
]
}
],
"prompt_number": 61
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"for item in myarray\n",
" pass\n",
"end"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 62
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"for (k,v) = ENV\n",
" print( k, v[1:min(length(v),' ',6)], ' ' ) \n",
"end"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"C"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
":=c:\\ COLUMNS80 JL_PRIVATE_LIBDIRbin JULIAC:\\Tem JULIA_EDITORstart JULIA_EXEjulia- JULIA_HOMEC:\\Tem LINES30 PROMPT$P$G SYS_PATHc:\\pyt TMPC:\\Use COMPUTERNAMEMM1911 USERDOMAINMITRE BURN_AUTOPLAYC:\\Pro EMC_AUTOPLAYC:\\Pro PSMODULEPATHC:\\Win COMMONPROGRAMFILESC:\\Pro PROCESSOR_IDENTIFIERIntel6 PROGRAMFILESC:\\Pro PROCESSOR_REVISION2a07 GPHOME_CLIENTSC:\\Pro PATHC:\\Tem NUMBER_OF_PROCESSORS8 PROGRAMFILES(X86)C:\\Pro WINDOWS_TRACING_FLAGS3 SSH_AGENT_PID1056 TK_LIBRARYC:\\Pyt PRGC:\\Pro GIT_SSHC:\\Pro TEMPC:\\Use ORACLE_HOMEC:\\Ora COMMONPROGRAMFILES(X86)C:\\Pro PROCESSOR_ARCHITECTUREAMD64 TIX_LIBRARYC:\\Pyt ALLUSERSPROFILEC:\\Pro TNS_ADMINC:\\Ora LOCALAPPDATAC:\\Use HOMEPATH\\Users USERDOMAIN_ROAMINGPROFILEMITRE PROGRAMW6432C:\\Pro USERNAMEKEITHC FP_NO_HOST_CHECKNO LOGONSERVER\\\\MBDC SYSTEMROOTC:\\Win SESSIONNAMEConsol PROGRAMDATAC:\\Pro PYTHONPATHC:\\Pyt SSH_AUTH_SOCK/tmp/s TCL_LIBRARYC:\\Pyt USERDNSDOMAINMITRE. R_HOMEC:\\Pro PATHEXT.COM;. GDAL_DATAC:\\Pro WINDIRC:\\Win WINDOWS_TRACING_LOGFILEC:\\BVT HOMEDRIVEC: RCAUTOPLAYC:\\Pro SYSTEMDRIVEC: P86C:\\Pro COMSPECC:\\Win SVN_SSHC:\\Pro APPDATAC:\\Use PROCESSOR_LEVEL6 COMMONPROGRAMW6432C:\\Pro OSWindow PUBLICC:\\Use VTK_DATA_ROOTC:\\Pyt USERPROFILEC:\\Use "
]
}
],
"prompt_number": 63
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# skipped examples with get_usage() and who"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 64
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"mytext=\"\"\"a frumpily godgered\n",
" skillufous banger.\n",
" nasbue u oiper \n",
" han yty poy\"\"\"\n",
"fakefile = IOBuffer(mytext)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 65,
"text": [
"IOBuffer([0x61,0x20,0x66,0x72,0x75,0x6d,0x70,0x69,0x6c,0x79 \u2026 0x61,0x6e,0x20,0x79,0x74,0x79,0x20,0x70,0x6f,0x79],true,false,true,false,66,9223372036854775807,1)"
]
}
],
"prompt_number": 65
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"while ~eof(fakefile)\n",
" ln=readline(fakefile)\n",
" words = split(ln)\n",
" for w in words\n",
" print(reverse(w)*\" \")\n",
" end \n",
"end"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"a "
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"ylipmurf deregdog suofulliks .regnab eubsan u repio nah yty yop "
]
}
],
"prompt_number": 66
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"data = [1, 2, 3]'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 67,
"text": [
"1x3 Array{Int64,2}:\n",
" 1 2 3"
]
}
],
"prompt_number": 67
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"data = [i-1 for i in data]'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 68,
"text": [
"1x3 Array{Any,2}:\n",
" 0 1 2"
]
}
],
"prompt_number": 68
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# skipped final example"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 69
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### PLEAC 4.6: Iterating over an array by reference"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"fruits = [\"Apple\", \"Blackberry\"]\n",
"for fruit in fruits\n",
" println( fruit, \" tastes good in a pie.\")\n",
"end"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Apple"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
" tastes good in a pie.\n",
"Blackberry tastes good in a pie.\n"
]
}
],
"prompt_number": 70
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# If you must explicitly index, use enumerate():\n",
"for (i, fruit) in enumerate(fruits)\n",
" println( i,' ', fruit, \" tastes good in a pie.\")\n",
"end"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"1"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
" Apple tastes good in a pie.\n",
"2 Blackberry tastes good in a pie.\n"
]
}
],
"prompt_number": 71
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"rogue_cats = [\"Morris\", \"Felix\"]\n",
"namedict = { \"felines\"=> rogue_cats }"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 72,
"text": [
"{\"felines\"=>[\"Morris\",\"Felix\"]}"
]
}
],
"prompt_number": 72
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"for cat in namedict[\"felines\"]\n",
" println( cat, \"purrs hypnotically.\")\n",
"end\n",
"println( \"--More-- \\nYou are controlled.\")"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Morris"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"purrs hypnotically.\n",
"Felixpurrs hypnotically.\n",
"--More-- \n",
"You are controlled.\n"
]
}
],
"prompt_number": 73
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"###PLEAC 4.7: Extracting unique elements from a list"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"ar=[1,2,2,4,5,6,6]\n",
"unique(ar)'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 74,
"text": [
"1x5 Array{Int64,2}:\n",
" 1 2 4 5 6"
]
}
],
"prompt_number": 74
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"myset=Set(ar...)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 75,
"text": [
"Set{Int64}(5,4,6,2,1)"
]
}
],
"prompt_number": 75
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"seen=Dict()\n",
"for item in ar\n",
" seen[item] = get(seen,item, 0) + 1\n",
"end\n",
"seen"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 76,
"text": [
"{5=>1,4=>1,6=>2,2=>2,1=>1}"
]
}
],
"prompt_number": 76
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"uniq=[k for k in keys(seen)]\n",
"uniq'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 77,
"text": [
"1x5 Array{Any,2}:\n",
" 5 4 6 2 1"
]
}
],
"prompt_number": 77
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# generate a list of users logged in, removing duplicates\n",
"# SKIP"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 78
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"sort(int(uniq))'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 79,
"text": [
"1x5 Array{Int64,2}:\n",
" 1 2 4 5 6"
]
}
],
"prompt_number": 79
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"###PLEAC 4.8: Finding elements in one array but not another"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"a_array = [1,2,4,6,8,10]\n",
"b_array = [2,5,6,8,11];"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 79
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"Set(b_array...)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 80,
"text": [
"Set{Int64}(5,6,2,11,8)"
]
}
],
"prompt_number": 80
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"setdiff( Set(a_array...), Set(b_array...))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 81,
"text": [
"Set{Int64}(4,10,1)"
]
}
],
"prompt_number": 81
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"setdiff(a_array, b_array)' #arrays get handled automatically; nice!"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 82,
"text": [
"1x3 Array{Int64,2}:\n",
" 1 4 10"
]
}
],
"prompt_number": 82
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"###PLEAC 4.9: Computing union, intersection or difference of unique arrays (sets)"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"a = Set(1, 3, 5, 6, 7, 8)\n",
"b = Set(2, 3, 5, 7, 9)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 83,
"text": [
"Set{Int64}(5,7,2,9,3)"
]
}
],
"prompt_number": 83
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"union(a,b)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 84,
"text": [
"Set{Int64}(5,6,7,2,9,8,3,1)"
]
}
],
"prompt_number": 84
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"intersect(a,b)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 85,
"text": [
"Set{Int64}(5,7,3)"
]
}
],
"prompt_number": 85
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"symdiff(a,b)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 86,
"text": [
"Set{Int64}(6,2,9,8,1)"
]
}
],
"prompt_number": 86
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"###PLEAC 4.10: Appending one array to another"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"push!(ar,9)'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 87,
"text": [
"1x8 Array{Int64,2}:\n",
" 1 2 2 4 5 6 6 9"
]
}
],
"prompt_number": 87
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"append!(ar,[3,4])'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 88,
"text": [
"1x10 Array{Int64,2}:\n",
" 1 2 2 4 5 6 6 9 3 4"
]
}
],
"prompt_number": 88
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"members = [\"Time\", \"Flies\"]\n",
"initiates = [\"An\", \"Arrow\"]"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 89,
"text": [
"2-element Array{ASCIIString,1}:\n",
" \"An\" \n",
" \"Arrow\""
]
}
],
"prompt_number": 89
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"append!(members,initiates)'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 90,
"text": [
"1x4 Array{ASCIIString,2}:\n",
" \"Time\" \"Flies\" \"An\" \"Arrow\""
]
}
],
"prompt_number": 90
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"insert!(members,3,\"Like\")'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 91,
"text": [
"1x5 Array{ASCIIString,2}:\n",
" \"Time\" \"Flies\" \"Like\" \"An\" \"Arrow\""
]
}
],
"prompt_number": 91
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"members[1]=\"Fruit\"\n",
"members[4:5]=[\"A\",\"Banana\"]\n",
"members'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 92,
"text": [
"1x5 Array{ASCIIString,2}:\n",
" \"Fruit\" \"Flies\" \"Like\" \"A\" \"Banana\""
]
}
],
"prompt_number": 92
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"###PLEAC 4.11: Reversing an array"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"reverse!(members)'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 93,
"text": [
"1x5 Array{ASCIIString,2}:\n",
" \"Banana\" \"A\" \"Like\" \"Flies\" \"Fruit\""
]
}
],
"prompt_number": 93
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"###PLEAC 4.12: Processing multiple elements of an array"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"ar = [i for i in 1:8]\n",
"# remove n elements from front of mylist, saving them into fron\n",
"front = splice!(ar,1:3)\n",
"front'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 94,
"text": [
"1x3 Array{Int64,2}:\n",
" 1 2 3"
]
}
],
"prompt_number": 94
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"ar'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 95,
"text": [
"1x5 Array{Int64,2}:\n",
" 4 5 6 7 8"
]
}
],
"prompt_number": 95
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# remove 1 element from the front , saving it in front\n",
"front = splice!(ar,1) "
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 96,
"text": [
"4"
]
}
],
"prompt_number": 96
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"ar'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 97,
"text": [
"1x4 Array{Int64,2}:\n",
" 5 6 7 8"
]
}
],
"prompt_number": 97
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# remove n elements from the end\n",
"splice!(ar,endof(ar)-1:endof(ar))'\n",
"ar"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 98,
"text": [
"2-element Array{Int64,1}:\n",
" 5\n",
" 6"
]
}
],
"prompt_number": 98
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# remove n elements from the end, saving them in end\n",
"myend = splice!(ar,endof(ar)-1:endof(ar))'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 99,
"text": [
"1x2 Array{Int64,2}:\n",
" 5 6"
]
}
],
"prompt_number": 99
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"ar = [i for i in 1:8]\n",
"myend=pop!(ar)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 100,
"text": [
"8"
]
}
],
"prompt_number": 100
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"function shift2(ar)\n",
" front = splice!(ar,1:2)\n",
" return front\n",
"end"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 101,
"text": [
"shift2 (generic function with 1 method)"
]
}
],
"prompt_number": 101
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"friends = split(\"Peter Paul Mary Jim Tim\")\n",
"this, that = shift2(friends)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 102,
"text": [
"2-element Array{String,1}:\n",
" \"Peter\"\n",
" \"Paul\" "
]
}
],
"prompt_number": 102
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"this, that, friends"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 103,
"text": [
"(\"Peter\",\"Paul\",[\"Mary\",\"Jim\",\"Tim\"])"
]
}
],
"prompt_number": 103
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"function pop2(ar)\n",
" back = splice!(ar,endof(ar)-1:endof(ar))\n",
"end"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 104,
"text": [
"pop2 (generic function with 1 method)"
]
}
],
"prompt_number": 104
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"beverages = split( \"Dew Jolt Cola Sprite Fresca\")\n",
"pair = pop2(beverages)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 105,
"text": [
"2-element Array{String,1}:\n",
" \"Sprite\"\n",
" \"Fresca\""
]
}
],
"prompt_number": 105
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"### PLEAC 4.13: Finding the First Array Element That Passes a Test"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"ar'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 106,
"text": [
"1x7 Array{Int64,2}:\n",
" 1 2 3 4 5 6 7"
]
}
],
"prompt_number": 106
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"criterion(n) = return (n>2) #short form function declaration\n",
"criterion(2)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 107,
"text": [
"false"
]
}
],
"prompt_number": 107
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"filter( n -> (n>2), ar)'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 108,
"text": [
"1x5 Array{Int64,2}:\n",
" 3 4 5 6 7"
]
}
],
"prompt_number": 108
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"employees = [(\"eng\",54,\"joe\"),(\"law\",65,\"billy\"),(\"eng\",72,\"bob\")]"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 109,
"text": [
"3-element Array{(ASCIIString,Int64,ASCIIString),1}:\n",
" (\"eng\",54,\"joe\") \n",
" (\"law\",65,\"billy\")\n",
" (\"eng\",72,\"bob\") "
]
}
],
"prompt_number": 109
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#use an anonymous function\n",
"eng =filter( emp->(emp[1]==\"eng\"), employees)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 110,
"text": [
"2-element Array{(ASCIIString,Int64,ASCIIString),1}:\n",
" (\"eng\",54,\"joe\")\n",
" (\"eng\",72,\"bob\")"
]
}
],
"prompt_number": 110
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"sal, idx =findmax([e[2] for e in eng])"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 111,
"text": [
"(72,2)"
]
}
],
"prompt_number": 111
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"println(\"Highest paid engineer is: $(eng[idx][3])\")"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Highest paid engineer is: bob"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n"
]
}
],
"prompt_number": 112
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"###PLEAC 4.14: Finding All Elements in an Array Matching Certain Criteria"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"matching = filter( emp->(emp[1]==\"eng\"), employees)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 113,
"text": [
"2-element Array{(ASCIIString,Int64,ASCIIString),1}:\n",
" (\"eng\",54,\"joe\")\n",
" (\"eng\",72,\"bob\")"
]
}
],
"prompt_number": 113
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"nums=999997:1000005\n",
"bigs = filter( n -> n>1000000, nums)'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 114,
"text": [
"1x5 Array{Int64,2}:\n",
" 1000001 1000002 1000003 1000004 1000005"
]
}
],
"prompt_number": 114
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#SKIP pigs : as it is for Dicts\n",
"#SKIP os.popen(\"who\") "
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 115
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"type Empl\n",
" category::String\n",
" salary::Int64\n",
" name::String\n",
"end"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 116
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"e1=Empl(\"eng\",45,\"Kyle\")"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 117,
"text": [
"Empl(\"eng\",45,\"Kyle\")"
]
}
],
"prompt_number": 117
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"ear =[ Empl(\"eng\",47,\"Jo\"), Empl(\"cat\",45,\"Kyle\"), Empl(\"eng\",56,\"Jim\")]"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 118,
"text": [
"3-element Array{Empl,1}:\n",
" Empl(\"eng\",47,\"Jo\") \n",
" Empl(\"cat\",45,\"Kyle\")\n",
" Empl(\"eng\",56,\"Jim\") "
]
}
],
"prompt_number": 118
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"eng = filter( e-> e.category==\"eng\", ear)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 119,
"text": [
"2-element Array{Empl,1}:\n",
" Empl(\"eng\",47,\"Jo\") \n",
" Empl(\"eng\",56,\"Jim\")"
]
}
],
"prompt_number": 119
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"type Appl\n",
" name::String\n",
" income::Int64\n",
"end"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 120
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"appls = [ Appl(\"Biff\",6), Appl(\"Buff\",6), Appl(\"Boff\",6)]"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 121,
"text": [
"3-element Array{Appl,1}:\n",
" Appl(\"Biff\",6)\n",
" Appl(\"Buff\",6)\n",
" Appl(\"Boff\",6)"
]
}
],
"prompt_number": 121
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"secondary_assistance = filter( appl-> appl.income<30000, appls)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 122,
"text": [
"3-element Array{Appl,1}:\n",
" Appl(\"Biff\",6)\n",
" Appl(\"Buff\",6)\n",
" Appl(\"Boff\",6)"
]
}
],
"prompt_number": 122
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"###PLEAC 4.16: Sorting an Array Numerically"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"narr = [1,5,3,6,8,3,2]\n",
"narr'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 123,
"text": [
"1x7 Array{Int64,2}:\n",
" 1 5 3 6 8 3 2"
]
}
],
"prompt_number": 123
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"sort(narr)'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 124,
"text": [
"1x7 Array{Int64,2}:\n",
" 1 2 3 3 5 6 8"
]
}
],
"prompt_number": 124
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"reverse(sort(narr))'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 125,
"text": [
"1x7 Array{Int64,2}:\n",
" 8 6 5 3 3 2 1"
]
}
],
"prompt_number": 125
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"sort(narr, rev=true)'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 126,
"text": [
"1x7 Array{Int64,2}:\n",
" 8 6 5 3 3 2 1"
]
}
],
"prompt_number": 126
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"###PLEAC 4.17: Sorting an array by a computable field"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"ordered = sort(narr)'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 127,
"text": [
"1x7 Array{Int64,2}:\n",
" 1 2 3 3 5 6 8"
]
}
],
"prompt_number": 127
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# computed field for ordering via by fn\n",
"ordered = sort(narr, by=(x-> -1x))' "
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 128,
"text": [
"1x7 Array{Int64,2}:\n",
" 8 6 5 3 3 2 1"
]
}
],
"prompt_number": 128
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# skip sort of /etc/passwd"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 129
},
{
"cell_type": "code",
"collapsed": false,
"input": [],
"language": "python",
"metadata": {},
"outputs": []
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"###PLEAC 4.18: Implementing a circular array"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# there has to be a better way to do this\n",
"type Circlei\n",
" index::Int64\n",
"end\n",
"\n",
"Circlei() = Circlei(1)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 130,
"text": [
"Circlei (constructor with 2 methods)"
]
}
],
"prompt_number": 130
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"circ = Circlei()"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 131,
"text": [
"Circlei(1)"
]
}
],
"prompt_number": 131
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import Base.next\n",
"function next(c::Circlei)\n",
" c.index = ((c.index+1) % 5)\n",
" c.index = c.index==0 ? 5 : c.index\n",
"end"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 132,
"text": [
"next (generic function with 45 methods)"
]
}
],
"prompt_number": 132
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"next(circ)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 133,
"text": [
"2"
]
}
],
"prompt_number": 133
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"abort_counter = 0\n",
"while abort_counter<7\n",
" next(circ)\n",
" println(\"Handling process $(circ.index)\")\n",
" abort_counter+=1\n",
"end"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Handling process 3"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
"Handling process 4\n",
"Handling process 5\n",
"Handling process 1\n",
"Handling process 2\n",
"Handling process 3\n",
"Handling process 4\n"
]
}
],
"prompt_number": 134
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"###PLEAC 4.19: Randomizing an array"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"ar'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 135,
"text": [
"1x7 Array{Int64,2}:\n",
" 1 2 3 4 5 6 7"
]
}
],
"prompt_number": 135
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"shuffle(ar)'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 136,
"text": [
"1x7 Array{Int64,2}:\n",
" 1 2 4 6 3 5 7"
]
}
],
"prompt_number": 136
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"shuffle!(ar) #in place\n",
"ar'"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 137,
"text": [
"1x7 Array{Int64,2}:\n",
" 7 6 1 4 3 5 2"
]
}
],
"prompt_number": 137
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"###PLEAC 4.20: Program words"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"SKIP"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"###PLEAC 4.21: Program permute"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"SKIP"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
";ipython nbconvert 4_pleac_arrays.ipynb"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stderr",
"text": [
"[NbConvertApp] Using existing profile dir: u'C:\\\\Users\\\\keithc\\\\.ipython\\\\profile_default'\r\n"
]
},
{
"output_type": "stream",
"stream": "stderr",
"text": [
"[NbConvertApp] Converting notebook 4_pleac_arrays.ipynb to html\r\n",
"[NbConvertApp] Support files will be in 4_pleac_arrays_files\\\r\n"
]
},
{
"output_type": "stream",
"stream": "stderr",
"text": [
"[NbConvertApp] Loaded template html_full.tpl\r\n"
]
},
{
"output_type": "stream",
"stream": "stderr",
"text": [
"[NbConvertApp] Writing 334838 bytes to 4_pleac_arrays.html\r\n"
]
}
],
"prompt_number": 140
},
{
"cell_type": "code",
"collapsed": false,
"input": [],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 139
}
],
"metadata": {}
}
]
}