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Add AllowRegexpMatch option to Performance/RedundantEqualityComparisonBlock #347

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koic
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@koic koic commented Mar 13, 2023

Follow up #340.

This PR adds AllowRegexpMatch option to Performance/RedundantEqualityComparisonBlock.

# `AllowRegexpMatch: true` (default)

# good
items.all? { |item| item =~ pattern }
items.all? { |item| item.match?(pattern) }

# `AllowRegexpMatch: false`

# bad
items.all? { |item| item =~ pattern }
items.all? { |item| item.match?(pattern) }

AllowRegexpMatch: false by default because regexp.match?('string') often used in block changes to the opposite result:

[/pattern/].all? { |regexp| regexp.match?('pattern') } # => true
[/pattern/].all? { |regexp| regexp =~ 'pattern' }      # => true
[/pattern/].all?('pattern')                            # => false

cc @fatkodima


Before submitting the PR make sure the following are checked:

  • The PR relates to only one subject with a clear title and description in grammatically correct, complete sentences.
  • Wrote good commit messages.
  • Commit message starts with [Fix #issue-number] (if the related issue exists).
  • Feature branch is up-to-date with master (if not - rebase it).
  • Squashed related commits together.
  • Added tests.
  • Ran bundle exec rake default. It executes all tests and runs RuboCop on its own code.
  • Added an entry (file) to the changelog folder named {change_type}_{change_description}.md if the new code introduces user-observable changes. See changelog entry format for details.

@koic koic force-pushed the add_allow_regexp_match_option_to_performance_redundant_equality_comparison_block branch from 0916a99 to ef0cdd4 Compare March 13, 2023 16:02
…isonBlock`

Follow up rubocop#340.

This PR adds `AllowRegexpMatch` option to `Performance/RedundantEqualityComparisonBlock`.

```ruby
# `AllowRegexpMatch: true` (default)

# good
items.all? { |item| item =~ pattern }
items.all? { |item| item.match?(pattern) }

# `AllowRegexpMatch: false`

# bad
items.all? { |item| item =~ pattern }
items.all? { |item| item.match?(pattern) }
```

`AllowRegexpMatch: false` by default because `regexp.match?('string')` often used in block
changes to the opposite result:

```ruby
[/pattern/].all? { |regexp| regexp.match?('pattern') } # => true
[/pattern/].all? { |regexp| regexp =~ 'pattern' }      # => true
[/pattern/].all?('pattern')                            # => false
```
@koic koic force-pushed the add_allow_regexp_match_option_to_performance_redundant_equality_comparison_block branch from ef0cdd4 to a160f92 Compare March 13, 2023 16:04
@fatkodima
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You probably forgot to add Changed: <<next>> to the default.yml.
Lgtm 👍 , thanks.

@koic
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koic commented Mar 14, 2023

VersionChanged: <<next>> is not written intentionally. Because #340 has not been released yet and the new AllowRegexpMatch option defaults to false so there is backward compatibility.

@koic koic merged commit 31cb27c into rubocop:master Mar 14, 2023
@koic koic deleted the add_allow_regexp_match_option_to_performance_redundant_equality_comparison_block branch March 14, 2023 16:52
koic added a commit that referenced this pull request Apr 9, 2023
#339 has been feature changed to #347.
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2 participants