ts-prime/dist/es/uniqBy.js

A utility library for JavaScript and Typescript.

import { purry } from './purry';
import { _reduceLazy } from './_reduceLazy';
export function uniqBy() {
    return purry(_uniqBy, arguments, lazyUniqBy);
}
function _uniqBy(array, transformer) {
    return _reduceLazy(array, lazyUniqBy(transformer));
}
function lazyUniqBy(transformer) {
    var set = new Set();
    return function (value) {
        var appliedItem = transformer(value);
        if (set.has(appliedItem)) {
            return {
                done: false,
                hasNext: false,
            };
        }
        set.add(appliedItem);
        return {
            done: false,
            hasNext: true,
            next: value,
        };
    };
}