Module: Enumerable

Defined in:
lib/enumerable/lazy.rb

Overview

Enumerable#lazy example implementation

Enumerable#lazy returns an instance of Enumerable::Lazy. You can use it just like as normal Enumerable object, except these methods act as ‘lazy’:

- map       collect
- select    find_all
- reject
- grep
- drop
- drop_while
- take_while
- flat_map  collect_concat
- zip

Example

This code prints the first 100 primes.

require 'prime'
INFINITY = 1.0 / 0
p (1..INFINITY).lazy.select{|m| m.prime?}.take(100)

Acknowledgements

Inspired by https://github.com/antimon2/enumerable_lz
http://jp.rubyist.net/magazine/?0034-Enumerable_lz (ja)

Defined Under Namespace

Classes: Lazy

Instance Method Summary collapse

Instance Method Details

#lazy ⇒ Object 



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# File 'lib/enumerable/lazy.rb', line 31

def lazy
  Lazy.new(self)
end