Function uniqBy

uniqBy<T, U>(arr: readonly T[], mapper: (item: T) => U): T[]
Returns a new array containing only the unique elements from the original array, based on the values returned by the mapper function. Based on https://es-toolkit.slash.page/reference/array/uniqBy.html

If there are multiple elements generating the same mapping, the first element among them is used as the value.
Type Parameters
- T
  The type of elements in the array.
- U
  The type of mapped elements.
Parameters
- arr: readonly T[]
  The array to process.
- mapper: (item: T) => U
  The function used to convert the array elements.
Returns T[]
A new array containing only the unique elements from the original array, based on the values returned by the mapper function.
Example
```
uniqBy([1.2, 1.5, 2.1, 3.2, 5.7, 5.3, 7.19], Math.floor);
// [1.2, 2.1, 3.2, 5.7, 7.19]

const array = [
  { category: 'fruit', name: 'apple' },
  { category: 'fruit', name: 'banana' },
  { category: 'vegetable', name: 'carrot' },
];

uniqBy(array, item => item.category).length
// 2
```
- Defined in utils/array/uniqBy.ts:29