[ruby-core:93422] [Ruby trunk Feature#11808] DIfferent behavior between Enumerable#grep and Array#grep
From:
nobu@...
Date:
2019-06-30 00:13:36 UTC
List:
ruby-core #93422
Issue #11808 has been updated by nobu (Nobuyoshi Nakada).
Backport deleted (2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN)
ruby -v deleted (2.2.2)
Description updated
Tracker changed from Bug to Feature
There is no API for it now.
https://github.com/nobu/ruby/tree/feature/11808-block_svar
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Feature #11808: DIfferent behavior between Enumerable#grep and Array#grep
https://bugs.ruby-lang.org/issues/11808#change-78963
* Author: BenOlive (Ben Olive)
* Status: Open
* Priority: Normal
* Assignee:
* Target version:
----------------------------------------
Regex special global variables are available within the block for `Array#grep`, but are nil within the block for `Enumerable#grep`.
Here is an example that explains it better:
~~~ruby
class Test
include Enumerable
def each
return enum_for(:each) unless block_given?
yield "Hello"
yield "World"
end
end
enum = Test.new
array = ["Hello", "World"]
enum.grep(/^(.)/) {$1} # => [nil, nil]
array.grep(/^(.)/) {$1} # => ["H", "W"]
~~~
Tested on 2.0.0, 2.1.5, & 2.2.2
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