Ruby笔记

Proc and lambda of block for snippt.rb

def foo  
    f = Proc.new { return "return from foo from inside proc" }  
    f.call # control leaves foo here  
    return "return from foo"   
  end  
    
  def bar  
    f = lambda { return "return from lambda" }  
    puts f.call # control does not leave bar here  prints "return from lambda" 
    return "return from bar"   
  end  
    
  puts foo # prints "return from foo from inside proc"   
  puts bar # prints "return from bar"   

总结.md

###数据类型

• 5, 5.0, 1e3, 数组[] , 区间(1..3,1...3) to_a,字典{:a=>2}
• 没有元组

###表达式关键字

• if a then b else c
• a ? b:c
• for i in 1..10 [方法break ， next & redo & retry]
• while end
• unless == if not
• until end
• case when end
• @ @@ $ ::

###函数()

• b = ->(a){print a} / b = proc{|x| print x} / lambda {|x| print x}
• def a(b=2); def a(*args);

###模块

###module m

• require / load 加载文件
• include / extend 加载模块

###类

class Person < Human
  public :say
 def initialize( name, age=18 )
 
 end
 attr_accessor :name
  def say(@name)
  end
end 

• 对象Person.new()