= enumerabler
* http://github.com/mame/enumerabler/tree/master
== DESCRIPTION:
enumerabler enhances Enumerable with methods returning enumerator.
== FEATURES/PROBLEMS:
- Enumerable#grepper
- Enumerable#finder_all (alias: all_finder, selector)
- Enumerable#rejecter
- Enumerable#collector (alias: mapper)
- Enumerable#flat_mapper (alias: concat_collector)
- Enumerable#zipper
- Enumerable#taker
- Enumerable#taker_while
- Enumerable#dropper
- Enumerable#dropper_while
== SYNOPSIS:
 require "enumerabler"
 # `select' and `selector' have the almost same behavior.
 ary.select {|x| x.even? }.take(10)
 ary.selector {|x| x.even? }.take(10)
 # While `select' returns an array, `selector' returns an Enumerator
 # corresponding the array. So, the latter requires no intermediate
 # array, which makes the latter more effective than the former.
 # Sieve of Eratosthenes
 def sieve(e, &blk)
 yield n = e.first
 sieve(e.rejecter {|x| x % n == 0 }, &blk)
 end
 sieve(2..(1.0/0.0)) {|x| p x } #=> 2, 3, 5, 7, 11, 13, 17, 19, 23, ...
 # Fibonacci numbers
 def fibonacci
 Enumerator.new do |e|
 e << 1
 e << 1
 fibonacci.zip(fibonacci.dropper(1)) {|x, y| e << x + y }
 end
 end
 fibonacci.each {|x| p x } #=> 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...
== REQUIREMENTS:
None
== INSTALL:
* gem install enumerabler
== LICENSE:
Copyright:: Yusuke Endoh <mame@tsg.ne.jp>
License:: Ruby's