locutus/esm/php/array/array_push.js

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

import { toPhpArrayObject } from "../_helpers/_phpTypes.js";
export function array_push(inputArr, ...values) {
    //  discuss at: https://locutus.io/php/array_push/
    // original by: Kevin van Zonneveld (https://kvz.io)
    // improved by: Brett Zamir (https://brett-zamir.me)
    //      note 1: Note also that IE retains information about property position even
    //      note 1: after being supposedly deleted, so if you delete properties and then
    //      note 1: add back properties with the same keys (including numeric) that had
    //      note 1: been deleted, the order will be as before; thus, this function is not
    //      note 1: really recommended with associative arrays (objects) in IE environments
    //   example 1: array_push(['kevin','van'], 'zonneveld')
    //   returns 1: 3
    const allDigits = /^\d+$/;
    let size = 0;
    let highestIdx = 0;
    let len = 0;
    if (Array.isArray(inputArr)) {
        for (const value of values) {
            inputArr.push(value);
        }
        return inputArr.length;
    }
    // Associative (object)
    const target = toPhpArrayObject(inputArr);
    for (const pr of Object.keys(target)) {
        ++len;
        if (allDigits.test(pr)) {
            size = parseInt(pr, 10);
            highestIdx = size > highestIdx ? size : highestIdx;
        }
    }
    for (const value of values) {
        target[++highestIdx] = value;
    }
    return len + values.length;
}