diff options
Diffstat (limited to 'activesupport')
| -rw-r--r-- | activesupport/lib/active_support/core_ext/array/random_access.rb | 7 |
1 files changed, 7 insertions, 0 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 index 7a4836cecd..edac7278bc 100644 --- a/activesupport/lib/active_support/core_ext/array/random_access.rb +++ b/activesupport/lib/active_support/core_ext/array/random_access.rb @@ -1,5 +1,12 @@ class Array # Backport of Array#sample based on Marc-Andre Lafortune's http://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, returns <tt>[]</tt>. + # + # [1,2,3,4,5,6].sample # => 4 + # [1,2,3,4,5,6].sample(3) # => [2, 4, 5] + # [].sample # => nil + # [].sample(3) # => [] def sample(n=nil) return self[Kernel.rand(size)] if n.nil? n = n.to_int |