hasanuzzaman sumon

Some awesome Ruby code

2015/10/25

Store method in variable

(Ruby functional programming properties using method) If you want to store a method rather than the result of calling a method or just the message you’d send to invoke it, you need to use the method method on the owning object. So for example.

"hello".method(:+)

will return the + method of the object “hello”, so that if you call it with the argument “ world”, you’ll get “hello world”.

helloplus = "hello".method(:+)
helloplus.call " world" # => "hello world"

Everything return something

In ruby every statement and block of code return some value even class</p>

a = class A
  def initialize
    @a = 11
    @@a = 22
    a = 33
  end

  @a = 1
  @@a = 2
  a = 3
end

A.instance_variable_get(:@a) # => 1
A.class_variable_get(:@@a) # => 2
a # => 3
A.new.instance_variable_get(:@a) # => 11
A.class_variable_get(:@@a) # => 22
A.new.method(:initialize).call # => 33 , basically we tricked Ruby into calling init

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