Add Arrays::mapKeys - #60
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Pull request overview
This PR adds a new Arrays::mapKeys method that transforms the keys of an array while preserving the values. The function accepts an iterable and a callback that transforms each key, supporting use cases like normalizing key casing.
Changes:
- Added
Arrays::mapKeys()method with PHPDoc documentation and example - Added comprehensive test coverage in
testMapKeys() - Updated README.md to document the new method
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
| src/Arrays.php | Implements the new mapKeys() method with template type annotations for type safety |
| tests/Unit/ArraysTest.php | Adds unit tests covering empty arrays, basic key transformation, and ArrayIterator support |
| README.md | Documents the new mapKeys method in the Arrays section |
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bram123
approved these changes
Jan 19, 2026
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Adds
Arrays::mapKeyswhich transforms the keys of an array to a new keyExample