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 Jimnez)
* 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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