Hash#sample method implementation like Array#sample
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Gemfile initial commit Aug 2, 2012
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roulette_wheel_selection.gemspec

README.md

RouletteWheelSelection

Hash#sample method is implemented with roulette wheel selection algorithm. Probability distribution is given by hash values.

Installation

Add this line to your application's Gemfile:

gem 'roulette_wheel_selection'

And then execute:

$ bundle

Or install it yourself as:

$ gem install roulette_wheel_selection

Usage

Set a hash for probability each keys. Hash#sample method returns random keys by probability distributions.

{ a: 50, b: 30, c: 20 }.sample => :a # 50% => :b # 30% => :c # 20%

Contributing

  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Added some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request