locutus/esm/php/array/array_intersect_key.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

import { toPhpArrayObject } from "../_helpers/_phpTypes.js";
export function array_intersect_key(arr1, ...arrays) {
    //  discuss at: https://locutus.io/php/array_intersect_key/
    // original by: Brett Zamir (https://brett-zamir.me)
    //      note 1: These only output associative arrays (would need to be
    //      note 1: all numeric and counting from zero to be numeric)
    //   example 1: var $array1 = {a: 'green', b: 'brown', c: 'blue', 0: 'red'}
    //   example 1: var $array2 = {a: 'green', 0: 'yellow', 1: 'red'}
    //   example 1: array_intersect_key($array1, $array2)
    //   returns 1: {0: 'red', a: 'green'}
    const retArr = {};
    if (arrays.length < 1) {
        return retArr;
    }
    const arr1Object = toPhpArrayObject(arr1);
    const keySets = arrays.map((nextArray) => new Set(Object.keys(toPhpArrayObject(nextArray))));
    for (const [k1, arr1Value] of Object.entries(arr1Object)) {
        if (keySets.every((keys) => keys.has(k1))) {
            retArr[k1] = arr1Value;
        }
    }
    return retArr;
}