reject
The reject function returns a new array with elements that do not satisfy the provided test function.
Syntax
typescript
reject<T>(array: T[], fn: (value: T, index?: number, array?: T[]) => boolean): T[];Parameters
| Name | Type | Description |
|---|---|---|
array | T[] | Source array |
fn | (value: T, index: number, array: T[]) => boolean | Predicate function |
Returns
| Type | Description |
|---|---|
T[] | New array with elements that fail predicate |
Examples
typescript
reject([1, 2, 3, 4], x => x % 2 === 0); // => [1, 3]
reject(['a', 'b', 'c'], x => x === 'b'); // => ['a', 'c']Notes
- Useful for filtering unwanted elements.
- Does not modify the original array.