README.rdoc

February 16, 2014 · View on GitHub

= Procstar {}[https://travis-ci.org/janlelis/procstar]

This gem provides {to_proc}[http://stackoverflow.com/questions/14881125/what-does-to-proc-method-mean] implementations for other Ruby classes than just Symbol.

== Setup

$ gem install procstar

Or in your Gemfile:

gem 'procstar'

== Usage

=== ArrayCallChain

Calls the method named by the first argument and passes the other elements as arguments. It is like using Symbol#to_proc with more than one argument.

require 'procstar/array_call_chain'
[1,2,3,4].map &[:*, 5] # => [5, 10, 15, 20]
# you can also chain them, if the first parameter is an Array
[1,2,3,4].map &[[:to_s, 2],[:+, 'b']]   # => ["1b", "10b", "11b", "100b"]

=== ClassNew

Creates a new instance of the class.

require 'procstar/class_new'
require 'set'
[[1,2],[3,5,6,7,3]].map(&Set) # => [Set[1,2], Set[5,6,7,3]]

=== HashFilter

Use a hash to apply procs to specific objects.

require 'procstar/hash_filter'
[1,2,3,4].map(&{ 2 => lambda {|e| e + 1000}, 4 => :to_s }) # => [1, 1002, 3, '4']

=== RegexpMatcher

Use &/regex/ to match it against strings.

require 'procstar/regexp_matcher'
%w|just another string array|.map    &/[jy]/ # => ["j", nil, nil, "y"]
%w|just another string array|.select &/[jy]/ # => ["just", "array"]

== More to_proc ideas? Start forking!