Array
ActiveSupport::CoreExtensions
Builtin-Module
rand
random_element
sample
active_support/core_ext/array/random_access.rb
<Toplevel Module>
<Built-in Module>
ActiveSupport
CoreExtensions
RandomAccess
Object
#10 in active_support/core_ext/array/random_access.rb
#16 in active_support/core_ext/array/random_access.rb
#22 in active_support/core_ext/array/random_access.rb
n=nil