[RUBY] How to create and execute method, Proc, Method class objects

Method

Method definition

Method definition

def method name(argument)
  #formula
end

╩╗End`less method definition

Available from Ruby 3 (planned)

def method name(argument) = #formula

Method call

Receiver.Method name(argument)

Proc class

How to create an object of Proc class

Proc

Proc.new{|argument|formula}
proc{|argument|formula}
Object of Symbol or Hash or Method class.to_proc[argument]

lambda

lambda{|argument|formula}
-> (argument){formula}

Executing a Proc object

Receiver[argument]
Receiver.(argument)
Receiver.call(argument)
Receiver.yield(argument)
Receiver=== #argument

Method class

How to create an object of Method class

Receiver.method(Method name Symbol or String)

Method invocation

Receiver[variable]
Receiver.(variable){formula}
Receiver.call(variable){formula}
Receiver===variable

References

class Proc class Method

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