RAILS CODE CLUB #2

+ Rails Tuesday

+ Rails Bridge 自主練習

+ BOARD GAME

19:20 開始

上期回顧

• 1 - Intention revealing method

• 簡單來說就是註解變成 method

• 2 - Special case objects

• 從源頭解決 nil 要特殊處理的問題

3 - REPLACE METHOD WITH METHOD OBJECT

• 主要⺫⽬目的是關進去 refactoring

• 開⼀一個新的 class，method body 移過去

• 讀 code，下註解，把註解變成 method

• 必須跨 methods 的 local variable 改成 instance variable

• 抽出的 method 請放成 private (關起來)

class OriginMethods def a_fat_method !!!! end end

# $%@ + ($@# / ^%) # && ^ %& * #%%^ # 看不懂的⻤⿁鬼 # and 100 lines...

class OriginMethods def a_fat_method !!!! end end

class NewMethodsdef perform

endend

# $%@ + ($@# / ^%) # && ^ %& * #%%^ # 看不懂的⻤⿁鬼 # and 100 lines...

class OriginMethods def a_fat_method !!!! end end

class NewMethods def perform !!!! end end

# $%@ + ($@# / ^%) # && ^ %& * #%%^ # 看不懂的⻤⿁鬼 # and 100 lines...

class OriginMethods def a_fat_method !!!! end end

class NewMethods def perform !!!! end end

# $%@ + ($@# / ^%) # && ^ %& * #%%^ # 看不懂的⻤⿁鬼 # and 100 lines...

NewMethods.new.perform

class NewMethods !!!! def perform File.open(??????????) # ... end end !class OriginMethods def a_fat_method(file_name) NewMethods.new.perform end end

?

class NewMethods !!!! def perform File.open( ) # ... end end !class OriginMethods def a_fat_method(file_name) NewMethods.new end end

class NewMethods !!!! def perform File.open( ) # ... end end !class OriginMethods def a_fat_method(file_name) NewMethods.new end end

(file_name).perform

class NewMethods !!!! def perform File.open( ) # ... end end !class OriginMethods def a_fat_method(file_name) NewMethods.new end end

def initialize(file_name)@file_name = file_name

end

(file_name).perform

class NewMethods !!!! def perform File.open( ) # ... end end !class OriginMethods def a_fat_method(file_name) NewMethods.new end end

@file_name

def initialize(file_name)@file_name = file_name

end

(file_name).perform

看懂以後 加⼊入註解

看懂以後 加⼊入註解

然後 註解變 method

改成 instance variable