Class: Ronad::Eventually

Inherits:
Monad
  • Object
show all
Defined in:
lib/ronad/eventually.rb

Overview

Delayed execution. Similar to creating a closure but Eventually is compatible with the Ronad API.

Eventually is not a promise. The block in the Eventually will not execute until invoked.

Instance Method Summary collapse

Methods inherited from Monad

#continue, #value, #~@

Constructor Details

#initialize(block) ⇒ Eventually

Returns a new instance of Eventually.



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# File 'lib/ronad/eventually.rb', line 8

def initialize block
  @value = block
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Ronad::Monad

Instance Method Details

#and_then(&block) ⇒ Object 



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# File 'lib/ronad/eventually.rb', line 13

def and_then &block
  new_block = lambda do
    block.call(expand @value.call)
  end

  Eventually.new new_block
end

#expand(val) ⇒ Object

Note:

can probably replace monad_value



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# File 'lib/ronad/eventually.rb', line 27

def expand(val)
  if Monad === val
    expand val.monad_value
  else
    val
  end
end

#monad_value ⇒ Object 



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# File 'lib/ronad/eventually.rb', line 22

def monad_value
  expand @value.call
end