随笔分类 -  Ruby

摘要：########################## Containers ############################# ########################## Arrays ################################# #The class Array holds a collection of object references. ... 阅读全文

摘要：########################## Singletons and other Constructors ################## class MyLogger private_class_method:new @@logger = nil def MyLogger.create @@logger = new unless @@logger @@l... 阅读全文

摘要：############################### Class ############################## class Song def initialize(name, artist, duration) @name = name @artist = artist @duration = duration end end #initializ... 阅读全文

摘要：############################ Block ####################### def call_block puts "start of method" yield yield puts "end of method" end call_block {puts "in the block"} def call_block yield("hel... 阅读全文

摘要：############################# Array And Hash ####################### #array with three elements a = [1, 'ca', 3.14] #access the first element puts(a[0]) #set the third element(nil means nothing) a[2... 阅读全文

摘要：#first program #function defination def say_goodnight(name) result = "Good night, #{name}" return result end #function invoke puts say_goodnight('Pa') #capitalize method def say_goodnight(name) ... 阅读全文