Ruby Meta programming

An object model

Kernel Module

Kernel.private_instance_methods.grep (/^pr/)

Private method

1 If a method recipient is not your own, be sure to specify a recipient

2 Private methods can only specify one implied recipient (private method of the tunable superclass)

The class itself is an object of class. The name of the class is a constant

Class

Include module when M is inserted into the ancestor chain, just above the class

Two methods

Obj.send (: Method,arg) #动态派发 Ojb.method (ARG)

Module#define_method #动态方法 instead of Def

String#grep () {}

def method_missing (Method,*args)

Puts "you Called:#{method} (#{args.join (', ')}"

End

Three blocks

Kernel#local_variables () Tracking the name of the binding

Ruby Scopes do not look outside as nested inside java/c#

class definition, module definition, method call Close the previous scope

Instance_eval

Instance_exec Available Parameters

Packaging code

Proc Lambda

&proc represents a block of code

The return in proc indicates that it is returned from the defined scope

Lambda Ruturn represents the return in the lambda

Ruby Meta programming