locutus/esm/php/array/array_intersect.js

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

import { entriesOfPhpAssoc, toPhpArrayObject } from "../_helpers/_phpTypes.js";
export function array_intersect(arr1, ...arrays) {
    //  discuss at: https://locutus.io/php/array_intersect/
    // 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', 0:'red', 1: 'blue'}
    //   example 1: var $array2 = {'b' : 'green', 0:'yellow', 1:'red'}
    //   example 1: var $array3 = ['green', 'red']
    //   example 1: var $result = array_intersect($array1, $array2, $array3)
    //   returns 1: {0: 'red', a: 'green'}
    const retArr = {};
    if (arrays.length < 1) {
        return retArr;
    }
    const arr1Object = toPhpArrayObject(arr1);
    arr1keys: for (const [k1, arr1Value] of entriesOfPhpAssoc(arr1Object)) {
        for (const nextArray of arrays) {
            const arr = toPhpArrayObject(nextArray);
            let found = false;
            for (const [, value] of entriesOfPhpAssoc(arr)) {
                if (value === arr1Value) {
                    found = true;
                    break;
                }
            }
            if (!found) {
                continue arr1keys;
            }
        }
        retArr[k1] = arr1Value;
    }
    return retArr;
}