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| author | Xavier Noria <fxn@hashref.com> | 2010-07-30 02:35:24 +0200 |
|---|---|---|
| committer | Xavier Noria <fxn@hashref.com> | 2010-07-30 02:35:24 +0200 |
| commit | ccd45618ed9a629c9535a5ff84ef5c238befa4ab (patch) | |
| tree | 0a582bf695dce01240762d2b8516efde43bc3515 /railties/guides/source | |
| parent | 3c3ff1377d17b584dd14d85c7cecab59ddff2679 (diff) | |
| parent | 755af497555fde16db86f7e51f6462b0aca79b49 (diff) | |
| download | rails-ccd45618ed9a629c9535a5ff84ef5c238befa4ab.tar.gz rails-ccd45618ed9a629c9535a5ff84ef5c238befa4ab.tar.bz2 rails-ccd45618ed9a629c9535a5ff84ef5c238befa4ab.zip | |
Merge remote branch 'rails/master'
Diffstat (limited to 'railties/guides/source')
| -rw-r--r-- | railties/guides/source/active_support_core_extensions.textile | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/railties/guides/source/active_support_core_extensions.textile b/railties/guides/source/active_support_core_extensions.textile index 6ee7a4220b..fcf4ae29ba 100644 --- a/railties/guides/source/active_support_core_extensions.textile +++ b/railties/guides/source/active_support_core_extensions.textile @@ -2214,7 +2214,14 @@ NOTE: Defined in +active_support/core_ext/array/conversions.rb+. h4. Wrapping -The class method +Array.wrap+ behaves like the function +Array()+ except that it does not try to call +to_a+ on its argument. That changes the behavior for enumerables: +The class method +Array.wrap+ behaves like the function +Array()+ except: + +* 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. + + + that it does not try to call +to_a+ on its argument. That changes the behavior for enumerables: <ruby> Array.wrap(:foo => :bar) # => [{:foo => :bar}] |