locutus/esm/php/array/array_change_key_case.js

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

import { toPhpArrayObject } from "../_helpers/_phpTypes.js";
export function array_change_key_case(array, cs) {
    //  discuss at: https://locutus.io/php/array_change_key_case/
    // original by: Ates Goral (https://magnetiq.com)
    // improved by: marrtins
    // improved by: Brett Zamir (https://brett-zamir.me)
    //   example 1: array_change_key_case(42)
    //   returns 1: false
    //   example 2: array_change_key_case([ 3, 5 ])
    //   returns 2: [3, 5]
    //   example 3: array_change_key_case({ FuBaR: 42 })
    //   returns 3: {"fubar": 42}
    //   example 4: array_change_key_case({ FuBaR: 42 }, 'CASE_LOWER')
    //   returns 4: {"fubar": 42}
    //   example 5: array_change_key_case({ FuBaR: 42 }, 'CASE_UPPER')
    //   returns 5: {"FUBAR": 42}
    //   example 6: array_change_key_case({ FuBaR: 42 }, 2)
    //   returns 6: {"FUBAR": 42}
    let result;
    if (Array.isArray(array)) {
        result = array;
    }
    else if (!array || typeof array !== 'object') {
        result = false;
    }
    else {
        const caseFunction = cs === undefined || cs === 0 || cs === 'CASE_LOWER' ? 'toLowerCase' : 'toUpperCase';
        const source = toPhpArrayObject(array);
        const transformed = {};
        for (const [key, value] of Object.entries(source)) {
            transformed[key[caseFunction]()] = value;
        }
        result = transformed;
    }
    return result;
}