Contents

unless Array.method_defined? :shuffle
  class Array
    def shuffle
      dup.shuffle!
    end

    # Standard in Ruby 1.8.7+. See official documentation[http://ruby-doc.org/core-1.9/classes/Array.html]
    def shuffle!
      raise TypeError, "can't modify frozen array" if frozen?
      size.times do |i|
        r = i + Kernel.rand(size - i)
        self[i], self[r] = self[r], self[i]
      end
      self
    end
  end
end

Version data entries

73 entries across 73 versions & 5 rubygems

Version	Path
backports-3.25.0	lib/backports/1.8.7/array/shuffle.rb
backports-3.24.1	lib/backports/1.8.7/array/shuffle.rb
backports-3.24.0	lib/backports/1.8.7/array/shuffle.rb
backports-3.23.0	lib/backports/1.8.7/array/shuffle.rb
backports-3.22.1	lib/backports/1.8.7/array/shuffle.rb
backports-3.22.0	lib/backports/1.8.7/array/shuffle.rb
backports-3.21.0	lib/backports/1.8.7/array/shuffle.rb
backports-3.20.2	lib/backports/1.8.7/array/shuffle.rb
backports-3.20.1	lib/backports/1.8.7/array/shuffle.rb
backports-3.20.0	lib/backports/1.8.7/array/shuffle.rb
backports-3.19.0	lib/backports/1.8.7/array/shuffle.rb
backports-3.18.2	lib/backports/1.8.7/array/shuffle.rb
backports-3.18.1	lib/backports/1.8.7/array/shuffle.rb
backports-3.18.0	lib/backports/1.8.7/array/shuffle.rb
files.com-1.0.55	docs/vendor/bundle/ruby/2.5.0/gems/backports-3.12.0/lib/backports/1.8.7/array/shuffle.rb
backports-3.17.2	lib/backports/1.8.7/array/shuffle.rb
backports-3.17.1	lib/backports/1.8.7/array/shuffle.rb
backports-3.17.0	lib/backports/1.8.7/array/shuffle.rb
backports-3.16.1	lib/backports/1.8.7/array/shuffle.rb
backports-3.16.0	lib/backports/1.8.7/array/shuffle.rb