{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 6-4 メソッド探索方法\n",
    "### 6-4-1 自身のメソッドを呼び出したときの探索方法"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       ":hello"
      ]
     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "class BaseClass\n",
    "  def hello\n",
    "    :hello\n",
    "  end\n",
    "end\n",
    "\n",
    "base_object = BaseClass.new\n",
    "base_object.hello"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 6-4-2 スーパークラスのメソッドを呼び出したときの探索方法"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       ":hello"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "class InheritClass < BaseClass\n",
    "end\n",
    "\n",
    "inherit_object = InheritClass.new\n",
    "inherit_object.hello"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 6-4-3 特異メソッドを呼び出したときの探索方法"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       ":singleton_method_hello"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "def base_object.hello\n",
    "  :singleton_method_hello\n",
    "end\n",
    "\n",
    "base_object.hello"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 6-4-4 クラスにmixinされたメソッドを呼び出したときの探索方法"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       ":hello_from_module"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "module HelloModule\n",
    "  def hello_from_module\n",
    "    :hello_from_module\n",
    "  end\n",
    "end\n",
    "\n",
    "class InheritClass\n",
    "  include HelloModule\n",
    "end\n",
    "\n",
    "inherit_object = InheritClass.new\n",
    "inherit_object.hello_from_module"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "MixinClass"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "module ByeModule\n",
    "end\n",
    "\n",
    "class MixinClass < BaseClass\n",
    "  include HelloModule\n",
    "  include ByeModule\n",
    "end"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "DuplicateMixinClass"
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "class DuplicateMixinClass < BaseClass\n",
    "  include HelloModule\n",
    "  include ByeModule\n",
    "  include HelloModule\n",
    "end"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 6-4-5 オブジェクトに依存しないメソッドを呼び出したときの探索方法"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "ename": "NoMethodError",
     "evalue": "undefined method `net_exist_method' for #<InheritClass:0x00007ff1cf8c1b58>",
     "output_type": "error",
     "traceback": [
      "\u001b[31mNoMethodError\u001b[0m: undefined method `net_exist_method' for #<InheritClass:0x00007ff1cf8c1b58>",
      "\u001b[37m(pry):44:in `<main>'\u001b[0m",
      "\u001b[37m/Users/ketchup/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/pry-0.12.2/lib/pry/pry_instance.rb:387:in `eval'\u001b[0m",
      "\u001b[37m/Users/ketchup/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/pry-0.12.2/lib/pry/pry_instance.rb:387:in `evaluate_ruby'\u001b[0m",
      "\u001b[37m/Users/ketchup/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/pry-0.12.2/lib/pry/pry_instance.rb:355:in `handle_line'\u001b[0m",
      "\u001b[37m/Users/ketchup/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/pry-0.12.2/lib/pry/pry_instance.rb:274:in `block (2 levels) in eval'\u001b[0m",
      "\u001b[37m/Users/ketchup/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/pry-0.12.2/lib/pry/pry_instance.rb:273:in `catch'\u001b[0m",
      "\u001b[37m/Users/ketchup/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/pry-0.12.2/lib/pry/pry_instance.rb:273:in `block in eval'\u001b[0m",
      "\u001b[37m/Users/ketchup/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/pry-0.12.2/lib/pry/pry_instance.rb:272:in `catch'\u001b[0m",
      "\u001b[37m/Users/ketchup/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/pry-0.12.2/lib/pry/pry_instance.rb:272:in `eval'\u001b[0m",
      "\u001b[37m/Users/ketchup/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/iruby-0.3/lib/iruby/backend.rb:66:in `eval'\u001b[0m",
      "\u001b[37m/Users/ketchup/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/iruby-0.3/lib/iruby/backend.rb:12:in `eval'\u001b[0m",
      "\u001b[37m/Users/ketchup/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/iruby-0.3/lib/iruby/kernel.rb:87:in `execute_request'\u001b[0m",
      "\u001b[37m/Users/ketchup/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/iruby-0.3/lib/iruby/kernel.rb:47:in `dispatch'\u001b[0m",
      "\u001b[37m/Users/ketchup/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/iruby-0.3/lib/iruby/kernel.rb:37:in `run'\u001b[0m",
      "\u001b[37m/Users/ketchup/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/iruby-0.3/lib/iruby/command.rb:70:in `run_kernel'\u001b[0m",
      "\u001b[37m/Users/ketchup/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/iruby-0.3/lib/iruby/command.rb:34:in `run'\u001b[0m",
      "\u001b[37m/Users/ketchup/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/iruby-0.3/bin/iruby:5:in `<top (required)>'\u001b[0m",
      "\u001b[37m/Users/ketchup/.rbenv/versions/2.6.1/bin/iruby:23:in `load'\u001b[0m",
      "\u001b[37m/Users/ketchup/.rbenv/versions/2.6.1/bin/iruby:23:in `<main>'\u001b[0m"
     ]
    }
   ],
   "source": [
    "inherit_object = InheritClass.new\n",
    "inherit_object.net_exist_method"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 6-4-6 メソッド探索のまとめ"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       ":hello_module"
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "module HelloModule\n",
    "  def hello\n",
    "    :hello_module\n",
    "  end\n",
    "end\n",
    "\n",
    "class GrandParentClass\n",
    "  def hello\n",
    "    :grand_parent_hello\n",
    "  end\n",
    "end\n",
    "\n",
    "class ParentClass < GrandParentClass\n",
    "  include HelloModule\n",
    "end\n",
    "\n",
    "class ChildClass < ParentClass\n",
    "end\n",
    "\n",
    "child = ChildClass.new\n",
    "child.hello"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 6-5 Module#prepend\n",
    "### 6-5-1 Module#prependの使い方"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       ":prepended_method"
      ]
     },
     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "module PrependModule\n",
    "  def prepended_method\n",
    "    :prepended_method\n",
    "  end\n",
    "end\n",
    "\n",
    "class PrependedClass\n",
    "  prepend PrependModule\n",
    "end\n",
    "\n",
    "prepended_obj = PrependedClass.new\n",
    "prepended_obj.prepended_method"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       ":from_prepend_module"
      ]
     },
     "execution_count": 11,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "module IncludeModule\n",
    "  def embeded_method\n",
    "    :from_include_module\n",
    "  end\n",
    "end\n",
    "\n",
    "module PrependModule\n",
    "  def embeded_method\n",
    "    :from_prepend_module\n",
    "  end\n",
    "end\n",
    "\n",
    "class EmbeddedClass\n",
    "  include IncludeModule\n",
    "  prepend PrependModule\n",
    "end\n",
    "\n",
    "embeded_obj = EmbeddedClass.new\n",
    "embeded_obj.embeded_method"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       ":from_prepend_module"
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "class ReverseEmbeddedClass\n",
    "  prepend PrependModule\n",
    "  include IncludeModule\n",
    "end\n",
    "\n",
    "reverse_embeded_obj = ReverseEmbeddedClass.new\n",
    "reverse_embeded_obj.embeded_method"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 6-5-2 Module#prependの動作"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       ":from_prepend_module"
      ]
     },
     "execution_count": 14,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "class PrependedClass\n",
    "  prepend PrependModule\n",
    "\n",
    "  def embeded_method\n",
    "    :prepended_class\n",
    "  end\n",
    "end\n",
    "\n",
    "obj = PrependedClass.new\n",
    "obj.embeded_method"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "super_call_method\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       ":overrode"
      ]
     },
     "execution_count": 16,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "module SuperCallModule\n",
    "  def super_call_method\n",
    "    puts \"super_call_method\"\n",
    "    super\n",
    "  end\n",
    "end\n",
    "\n",
    "class OverrideClass\n",
    "  prepend SuperCallModule\n",
    "\n",
    "  def super_call_method\n",
    "    :overrode\n",
    "  end\n",
    "end\n",
    "\n",
    "override_obj = OverrideClass.new\n",
    "override_obj.super_call_method"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "\"Hi! hello\""
      ]
     },
     "execution_count": 17,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "module BeforeHelloFilter\n",
    "  def hello\n",
    "    \"Hi! \" + super\n",
    "  end\n",
    "end\n",
    "\n",
    "class Hello\n",
    "  prepend BeforeHelloFilter\n",
    "\n",
    "  def hello\n",
    "    \"hello\"\n",
    "  end\n",
    "end\n",
    "\n",
    "Hello.new.hello"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       ":second_prepend_method"
      ]
     },
     "execution_count": 18,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "module FirstPrependModule\n",
    "  def prepended_method\n",
    "    :first_prepend_module\n",
    "  end\n",
    "end\n",
    "\n",
    "module SecondPrependModule\n",
    "  def prepended_method\n",
    "    :second_prepend_method\n",
    "  end\n",
    "end\n",
    "\n",
    "class PrependedClass\n",
    "  prepend FirstPrependModule\n",
    "  prepend SecondPrependModule\n",
    "end\n",
    "\n",
    "prepended_obj = PrependedClass.new\n",
    "prepended_obj.prepended_method"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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