@newdash/newdash/unionBy.js

javascript/typescript utility library

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.unionBy = void 0;
const baseFlatten_1 = __importDefault(require("./.internal/baseFlatten"));
const baseUniq_1 = __importDefault(require("./.internal/baseUniq"));
const isArrayLikeObject_1 = __importDefault(require("./isArrayLikeObject"));
const last_1 = __importDefault(require("./last"));
const getIteratee_1 = __importDefault(require("./.internal/getIteratee"));
/**
 * This method is like `union` except that it accepts `iteratee` which is
 * invoked for each element of each `arrays` to generate the criterion by
 * which uniqueness is computed. Result values are chosen from the first
 * array in which the value occurs. The iteratee is invoked with one argument:
 * (value).
 *
 * @since 5.11.0
 * @category Array
 * @param arrays The arrays to inspect.
 * @param iteratee The iteratee invoked per element.
 * @returns Returns the new array of combined values.
 * @see [[difference]], [[union]], [[unionWith]], [[without]], [[xor]], [[xorBy]]
 * @example
 *
 * ```js
 * unionBy([2.1], [1.2, 2.3], Math.floor)
 * // => [2.1, 1.2]
 * ```
 */
function unionBy(...arrays) {
    let iteratee = (0, last_1.default)(arrays);
    if ((0, isArrayLikeObject_1.default)(iteratee)) {
        iteratee = undefined;
    }
    return (0, baseUniq_1.default)((0, baseFlatten_1.default)(arrays, 1, isArrayLikeObject_1.default, true), (0, getIteratee_1.default)(iteratee, 2));
}
exports.unionBy = unionBy;
exports.default = unionBy;