remove Array#sample from core_ext

activesupport/lib/active_support/core_ext/array.rb

@@ -4,5 +4,4 @@ require 'active_support/core_ext/array/uniq_by'
 require 'active_support/core_ext/array/conversions'
 require 'active_support/core_ext/array/extract_options'
 require 'active_support/core_ext/array/grouping'
-require 'active_support/core_ext/array/random_access'
 require 'active_support/core_ext/array/prepend_and_append'

activesupport/lib/active_support/core_ext/array/random_access.rb

@@ -1,30 +0,0 @@
-class Array
-  # Backport of Array#sample based on Marc-Andre Lafortune's https://github.com/marcandre/backports/
-  # Returns a random element or +n+ random elements from the array.
-  # If the array is empty and +n+ is nil, returns <tt>nil</tt>.
-  # If +n+ is passed and its value is less than 0, it raises an +ArgumentError+ exception.
-  # If the value of +n+ is equal or greater than 0 it returns <tt>[]</tt>.
-  #
-  #   [1,2,3,4,5,6].sample     # => 4
-  #   [1,2,3,4,5,6].sample(3)  # => [2, 4, 5]
-  #   [1,2,3,4,5,6].sample(-3) # => ArgumentError: negative array size
-  #              [].sample     # => nil
-  #              [].sample(3)  # => []
-  def sample(n=nil)
-    return self[Kernel.rand(size)] if n.nil?
-    n = n.to_int
-  rescue Exception => e
-    raise TypeError, "Coercion error: #{n.inspect}.to_int => Integer failed:\n(#{e.message})"
-  else
-    raise TypeError, "Coercion error: obj.to_int did NOT return an Integer (was #{n.class})" unless n.kind_of? Integer
-    raise ArgumentError, "negative array size" if n < 0
-    n = size if n > size
-    result = Array.new(self)
-    n.times do |i|
-      r = i + Kernel.rand(size - i)
-      result[i], result[r] = result[r], result[i]
-    end
-    result[n..size] = []
-    result
-  end unless method_defined? :sample
-end

activesupport/test/core_ext/array_ext_test.rb

@@ -363,34 +363,6 @@ class ArrayUniqByTests < Test::Unit::TestCase
   end
 end
 
-class ArrayExtRandomTests < ActiveSupport::TestCase
-  def test_sample_from_array
-    assert_nil [].sample
-    assert_equal [], [].sample(5)
-    assert_equal 42, [42].sample
-    assert_equal [42], [42].sample(5)
-
-    a = [:foo, :bar, 42]
-    s = a.sample(2)
-    assert_equal 2, s.size
-    assert_equal 1, (a-s).size
-    assert_equal [], a-(0..20).sum{a.sample(2)}
-
-    o = Object.new
-    def o.to_int; 1; end
-    assert_equal [0], [0].sample(o)
-
-    o = Object.new
-    assert_raises(TypeError) { [0].sample(o) }
-
-    o = Object.new
-    def o.to_int; ''; end
-    assert_raises(TypeError) { [0].sample(o) }
-
-    assert_raises(ArgumentError) { [0].sample(-7) }
-  end
-end
-
 class ArrayWrapperTests < Test::Unit::TestCase
   class FakeCollection
     def to_ary