diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/array/random_access.rb')
| -rw-r--r-- | activesupport/lib/active_support/core_ext/array/random_access.rb | 30 |
1 files changed, 0 insertions, 30 deletions
diff --git a/activesupport/lib/active_support/core_ext/array/random_access.rb b/activesupport/lib/active_support/core_ext/array/random_access.rb deleted file mode 100644 index bb1807a68a..0000000000 --- a/activesupport/lib/active_support/core_ext/array/random_access.rb +++ /dev/null @@ -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 |