{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 5-3-4 先頭と末尾"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "true"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "pattern = /\\A\\d{3}-\\d{4}-\\d{4}\\z/\n",
    "\n",
    "pattern === '080-1234-5678'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "false"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "pattern === 'Phone: 080-1234-5678'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "false"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "pattern === '080-1234-5678 (mobile)'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "false\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "true"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "lines = \"1234\\nabcd\"\n",
    "\n",
    "p(/\\A\\d+\\z/ === lines)\n",
    "/^\\d+$/ === lines"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 5-3-5 グルーピングと後方参照/部分式呼び出し"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "true\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "\"B\""
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "p(/(B)\\ to\\ \\1/ === 'B to B')\n",
    "\n",
    "$1"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "\"123\""
      ]
     },
     "execution_count": 7,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "/(?<number>[0-9]+)/ === 'abc-123'\n",
    "\n",
    "Regexp.last_match[:number]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "true"
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "/(?<num>[0-9]+)[a-c\\-]+\\k<num>/ === '123-abc-123'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "#<MatchData \"123-abc-123\" num:\"123\">"
      ]
     },
     "execution_count": 13,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "/(?<num>[0-9]+)[a-c\\-]+\\k<num>/ === '123-abc-123'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "metadata": {
    "collapsed": false,
    "scrolled": false
   },
   "outputs": [
    {
     "ename": "NoMethodError",
     "evalue": "undefined method `named_captures' for #<MatchData \"123-abc-123\" num:\"123\" alp:\"-abc-\">",
     "output_type": "error",
     "traceback": [
      "\u001b[31mNoMethodError\u001b[0m: undefined method `named_captures' for #<MatchData \"123-abc-123\" num:\"123\" alp:\"-abc-\">",
      "\u001b[37m(pry):41:in `<main>'\u001b[0m",
      "\u001b[37m/Users/ariga/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/pry-0.10.3/lib/pry/pry_instance.rb:355:in `eval'\u001b[0m",
      "\u001b[37m/Users/ariga/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/pry-0.10.3/lib/pry/pry_instance.rb:355:in `evaluate_ruby'\u001b[0m",
      "\u001b[37m/Users/ariga/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/pry-0.10.3/lib/pry/pry_instance.rb:323:in `handle_line'\u001b[0m",
      "\u001b[37m/Users/ariga/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/pry-0.10.3/lib/pry/pry_instance.rb:243:in `block (2 levels) in eval'\u001b[0m",
      "\u001b[37m/Users/ariga/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/pry-0.10.3/lib/pry/pry_instance.rb:242:in `catch'\u001b[0m",
      "\u001b[37m/Users/ariga/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/pry-0.10.3/lib/pry/pry_instance.rb:242:in `block in eval'\u001b[0m",
      "\u001b[37m/Users/ariga/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/pry-0.10.3/lib/pry/pry_instance.rb:241:in `catch'\u001b[0m",
      "\u001b[37m/Users/ariga/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/pry-0.10.3/lib/pry/pry_instance.rb:241:in `eval'\u001b[0m",
      "\u001b[37m/Users/ariga/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/iruby-0.2.8/lib/iruby/backend.rb:65:in `eval'\u001b[0m",
      "\u001b[37m/Users/ariga/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/iruby-0.2.8/lib/iruby/backend.rb:12:in `eval'\u001b[0m",
      "\u001b[37m/Users/ariga/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/iruby-0.2.8/lib/iruby/kernel.rb:87:in `execute_request'\u001b[0m",
      "\u001b[37m/Users/ariga/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/iruby-0.2.8/lib/iruby/kernel.rb:47:in `dispatch'\u001b[0m",
      "\u001b[37m/Users/ariga/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/iruby-0.2.8/lib/iruby/kernel.rb:37:in `run'\u001b[0m",
      "\u001b[37m/Users/ariga/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/iruby-0.2.8/lib/iruby/command.rb:70:in `run_kernel'\u001b[0m",
      "\u001b[37m/Users/ariga/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/iruby-0.2.8/lib/iruby/command.rb:34:in `run'\u001b[0m",
      "\u001b[37m/Users/ariga/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/iruby-0.2.8/bin/iruby:5:in `<top (required)>'\u001b[0m",
      "\u001b[37m/Users/ariga/.rbenv/versions/2.3.0/bin/iruby:23:in `load'\u001b[0m",
      "\u001b[37m/Users/ariga/.rbenv/versions/2.3.0/bin/iruby:23:in `<main>'\u001b[0m"
     ]
    }
   ],
   "source": [
    "/(?<num>[0-9]+)(?<alp>[a-c\\-]+)\\k<num>/ === '123-abc-123'\n",
    "Regexp.last_match.named_captures\n",
    "# 2.4で来る"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "true\n",
      "false\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "true"
      ]
     },
     "execution_count": 26,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "phone = '080-1234-5678'\n",
    "\n",
    "p(/([0-9]+)-\\g<1>-\\g<1>/ === phone)\n",
    "\n",
    "p(/([0-9]+)-\\1-\\1/ === phone)\n",
    "/([0-9]+)-\\1-\\1/ === '080-080-080'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "true"
      ]
     },
     "execution_count": 28,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "/(?<num>[0-9]+)-\\g<num>-\\g<num>/ === phone"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  }
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