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[DOC] Fix and improve array slicing example in range.c

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* [DOC] Fix typo in range.c

  In the example of the beginless range used for array slicing,
  '..' range literal was used while the '...' literal was expected

* [DOC] Add example for array slicing in range.c

  Add an example for the array slice with the beginless range
  using the '..' range literal

* [DOC] Add comments for array slicing in range.c

  Add comments to make crystal clear what the '..' and '...'
  range literals do when used for array slicing as beginless range
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Iskren 2024-07-17 04:42:29 +02:00 • committed by GitHub
parent dabb6c49aa
commit 371790165f
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Notes: git 2024-07-17 02:42:47 +00:00 
Merged: https://github.com/ruby/ruby/pull/11150

Merged-By: nobu <nobu@ruby-lang.org>
1 changed files with 6 additions and 2 deletions
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range.c
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@ -2438,8 +2438,12 @@ range_overlap(VALUE range, VALUE other)
* A beginless range may be used to slice an array:
*
* a = [1, 2, 3, 4]
* r = (..2) # => nil...2
* a[r] # => [1, 2]
* # Include the third array element in the slice
* r = (..2) # => nil..2
* a[r] # => [1, 2, 3]
* # Exclude the third array element from the slice
* r = (...2) # => nil...2
* a[r] # => [1, 2]
*
* \Method +each+ for a beginless range raises an exception.
*