Function deduplicateBy`Const`

deduplicateBy<T, K>(
keySelector: IndexedSelector<T, K>,
): (src: Iterable) => Iterable
Removes duplicate elements from an iterable by the key produced by keySelector.

Curried version of _deduplicateBy.
Type Parameters
- T
  Element type produced by the source iterable.
- K
  Key type generated from each element.
Parameters
- keySelector: IndexedSelector<T, K>
  Selector receiving each element and its index, yielding the key used for distinctness.
Returns (src: Iterable) => Iterable
An iterable yielding the first element encountered for each distinct key.
Throws
Error Propagates any error thrown by keySelector.
Example
```
const data = [
  { id: 1, value: "a" },
  { id: 1, value: "b" },
  { id: 2, value: "c" },
];

const deduped = [..._deduplicateBy(data, ({ id }) => id)];
// deduped === [data[0], data[2]]
```