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angular__angular/packages/forms
Dylan Hunn f490c2de4e feat(forms): support negative indices in FormArray methods. (#44848)
This new feature allows negative indices to wrap around from the back, just like ES2021 `Array.at`. In particular, the following methods accept negative indices, and behave like corresponding Array methods:
* `FormArray.at(index)`: behaves the same as `Array.at(index)`
* `FormArray.insert(index, control)`: behaves the same as `Array.splice(index, 0, control)`
* `FormArray.setControl(index, control)`: behaves the same as `Array.splice(index, 1, control)`
* `FormArray.removeAt(index, control)`: behaves the same as `Array.splice(index, 1)`

Previous work in #44746 and #44631 (by @amitbeck).

Issue #44642.

Co-authored-by: Amit Beckenstein <amitbeck@gmail.com>

PR Close #44848
2022-01-28 16:58:29 +00:00
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