@@ -1,5 +1,14 @@ class Array + def randomize(limit = length) + choices = dup + returning([]) do |result| + [limit, length].min.times do + result << choices.delete_at(Kernel.rand(choices.length)) + end + end.compact + end + def uniq_with_block!(&block) uniq_without_block! if block_given? lib/awesomeness/core_ext/array.rb @@ -36,4 +36,13 @@ class ArrayTest < Test::Unit::TestCase a.pad!(4, 'x') assert_equal [1,2,3,'x'], a end + + def test_randomize_length + assert_equal 4, (1..10).to_a.randomize(4).length + end + + def test_randomize_with_fewer_options + a = [1,2,3] + assert_equal 3, a.randomize(10).length + end end \ No newline at end of file test/core_ext/array_test.rb 7ddd68f539dcc2fb9fb11b7443df4cfae0f9ad4c Brandon Keepers brandon@collectiveidea.com http://github.com/collectiveidea/awesomeness/commit/eb7e4e9878999e75349c6dc226dac5a8ea613361 eb7e4e9878999e75349c6dc226dac5a8ea613361 2009-01-05T11:09:01-08:00 2009-01-05T11:01:47-08:00 Added Array#randomize c071be5b307aa04f2f3f069ec1c928928b160bea Brandon Keepers brandon@collectiveidea.com