diff options
Diffstat (limited to 'activesupport/lib')
-rw-r--r-- | activesupport/lib/active_support/core_ext/array/wrap.rb | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/activesupport/lib/active_support/core_ext/array/wrap.rb b/activesupport/lib/active_support/core_ext/array/wrap.rb index e211bdeeca..09a1c2e5a1 100644 --- a/activesupport/lib/active_support/core_ext/array/wrap.rb +++ b/activesupport/lib/active_support/core_ext/array/wrap.rb @@ -1,9 +1,14 @@ class Array - # Wraps the object in an Array unless it's an Array. Converts the - # object to an Array using #to_ary if it implements that. + # <tt>Array.wrap</tt> is like <tt>Kernel#Array</tt> except: # - # It differs with Array() in that it does not call +to_a+ on - # the argument: + # * If the argument responds to +to_ary+ the method is invoked. <tt>Kernel#Array</tt> + # moves on to try +to_a+ if the returned value is +nil+, but <tt>Arraw.wrap</tt> returns + # such a +nil+ right away. + # * If the returned value from +to_ary+ is neither +nil+ nor an +Array+ object, <tt>Kernel#Array</tt> + # raises an exception, while <tt>Array.wrap</tt> does not, it just returns the value. + # * It does not call +to_a+ on the argument, though special-cases +nil+ to return an empty array. + # + # The last point is particularly worth comparing for some enumerables: # # Array(:foo => :bar) # => [[:foo, :bar]] # Array.wrap(:foo => :bar) # => [{:foo => :bar}] |