[#91458] [Ruby trunk Feature#4475] default variable name for parameter — matz@...
Issue #4475 has been updated by matz (Yukihiro Matsumoto).
3 messages
2019/02/07
[ruby-core:91524] [Ruby trunk Feature#15323] [PATCH] Proposal: Add Enumerable#filter_map
From:
shugo@...
Date:
2019-02-13 02:41:40 UTC
List:
ruby-core #91524
Issue #15323 has been updated by shugo (Shugo Maeda).
+1 for filter_map.
Matz agreed the feature itself before: https://bugs.ruby-lang.org/issues/5663#note-42
The name filter_map is good because other languages have similar names (e.g., filter-map in Scheme).
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Feature #15323: [PATCH] Proposal: Add Enumerable#filter_map
https://bugs.ruby-lang.org/issues/15323#change-76785
* Author: alfonsojimenez (Alfonso Jim辿nez)
* Status: Open
* Priority: Normal
* Assignee:
* Target version:
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This is a proposal for a combined `filter` + `map` method (https://bugs.ruby-lang.org/issues/5663).
This method both filters and maps the elements of an enumerable in just one iteration:
~~~ ruby
(1..10).filter_map { |i| i * 2 if i.even? } #=> [4, 8, 12, 16, 20]
~~~
GitHub PR: https://github.com/ruby/ruby/pull/2017
---Files--------------------------------
0001-Adding-Enumerable-filter_map.patch (4.61 KB)
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