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| author | Xavier Noria <fxn@hashref.com> | 2010-07-13 23:35:58 +0200 |
|---|---|---|
| committer | Xavier Noria <fxn@hashref.com> | 2010-07-13 23:36:29 +0200 |
| commit | 00f49c74e8354e393ed4ffd6bfa8beb657c8920d (patch) | |
| tree | bb88edb5589c6f495afd8a2bebced435ab6621ef /railties | |
| parent | edb5401039ee15c37b201244c5dbf660bed51fb4 (diff) | |
| download | rails-00f49c74e8354e393ed4ffd6bfa8beb657c8920d.tar.gz rails-00f49c74e8354e393ed4ffd6bfa8beb657c8920d.tar.bz2 rails-00f49c74e8354e393ed4ffd6bfa8beb657c8920d.zip | |
AS guides: reword the docs of Enumerable#group_by
Diffstat (limited to 'railties')
| -rw-r--r-- | railties/guides/source/active_support_core_extensions.textile | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/railties/guides/source/active_support_core_extensions.textile b/railties/guides/source/active_support_core_extensions.textile index 58824d7aeb..097d51e007 100644 --- a/railties/guides/source/active_support_core_extensions.textile +++ b/railties/guides/source/active_support_core_extensions.textile @@ -1840,9 +1840,7 @@ h3. Extensions to +Enumerable+ h4. +group_by+ -Ruby 1.8.7 and up define +group_by+, and Active Support does it for previous versions. - -This iterator takes a block and builds an ordered hash with its return values as keys. Each key is mapped to the array of elements for which the block returned that value: +Active Support redefines +group_by+ in Ruby 1.8.7 so that it returns an ordered hash as in 1.9: <ruby> entries_by_surname_initial = address_book.group_by do |entry| @@ -1850,7 +1848,7 @@ entries_by_surname_initial = address_book.group_by do |entry| end </ruby> -WARNING. Active Support redefines +group_by+ in Ruby 1.8.7 so that it still returns an ordered hash. +Distinct block return values are added to the hash as they come, so that's the resulting order. NOTE: Defined in +active_support/core_ext/enumerable.rb+. |