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docs(uniqBy): fix docs for uniqBy (#231)

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* docs: fix uniqBy doc example

* test: add test case

---------

Co-authored-by: Sojin Park <raon0211@toss.im>
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2
docs/ko/reference/array/uniqBy.md
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@ -21,5 +21,5 @@ function uniqBy<T, U>(arr: T[], mapper: (item: T) => U): T[];
```typescript
uniqBy([1.2, 1.5, 2.1, 3.2, 5.7, 5.3, 7.19], Math.floor);
// [1.2, 2.1, 3.3, 5.7, 7.19]
// [1.2, 2.1, 3.2, 5.7, 7.19]
```

2
docs/reference/array/uniqBy.md
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@ -21,5 +21,5 @@ function uniqBy<T, U>(arr: T[], mapper: (item: T) => U): T[];
```typescript
uniqBy([1.2, 1.5, 2.1, 3.2, 5.7, 5.3, 7.19], Math.floor);
// [1.2, 2.1, 3.3, 5.7, 7.19]
// [1.2, 2.1, 3.2, 5.7, 7.19]
```

1
src/array/uniqBy.spec.ts
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@ -4,5 +4,6 @@ import { uniqBy } from './uniqBy';
describe('uniqBy', () => {
it('should work with a `mapper`', () => {
expect(uniqBy([2.1, 1.2, 2.3], Math.floor)).toEqual([2.1, 1.2]);
expect(uniqBy([1.2, 1.5, 2.1, 3.2, 5.7, 5.3, 7.19], Math.floor)).toEqual([1.2, 2.1, 3.2, 5.7, 7.19]);
});
});

2
src/array/uniqBy.ts
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@ -11,7 +11,7 @@
* @example
* ```ts
* uniqBy([1.2, 1.5, 2.1, 3.2, 5.7, 5.3, 7.19], Math.floor);
* // [1.2, 2.1, 3.3, 5.7, 7.19]
* // [1.2, 2.1, 3.2, 5.7, 7.19]
* ```
*/
export function uniqBy<T, U>(arr: readonly T[], mapper: (item: T) => U): T[] {