locutus/esm/php/array/array_column.js

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

import { toPhpArrayObject } from "../_helpers/_phpTypes.js";
export function array_column(input, columnKey, indexKey) {
    //  discuss at: https://locutus.io/php/array_column/
    // original by: Enzo Dañobeytía
    //   example 1: array_column([{name: 'Alex', value: 1}, {name: 'Elvis', value: 2}, {name: 'Michael', value: 3}], 'name')
    //   returns 1: {0: "Alex", 1: "Elvis", 2: "Michael"}
    //   example 2: array_column({0: {name: 'Alex', value: 1}, 1: {name: 'Elvis', value: 2}, 2: {name: 'Michael', value: 3}}, 'name')
    //   returns 2: {0: "Alex", 1: "Elvis", 2: "Michael"}
    //   example 3: array_column([{name: 'Alex', value: 1}, {name: 'Elvis', value: 2}, {name: 'Michael', value: 3}], 'name', 'value')
    //   returns 3: {1: "Alex", 2: "Elvis", 3: "Michael"}
    //   example 4: array_column([{name: 'Alex', value: 1}, {name: 'Elvis', value: 2}, {name: 'Michael', value: 3}], null, 'value')
    //   returns 4: {1: {name: 'Alex', value: 1}, 2: {name: 'Elvis', value: 2}, 3: {name: 'Michael', value: 3}}
    if (input === null || typeof input !== 'object') {
        return undefined;
    }
    const normalizedInput = Array.isArray(input) ? input : Object.values(toPhpArrayObject(input));
    const result = {};
    let fallbackIndex = 0;
    for (const rowValue of normalizedInput) {
        const row = toPhpArrayObject(rowValue);
        const indexCandidate = indexKey === null ? undefined : row[String(indexKey)];
        const value = columnKey === null ? rowValue : row[String(columnKey)];
        if (indexCandidate !== undefined && indexCandidate !== null) {
            result[String(indexCandidate)] = value;
        }
        else {
            result[String(fallbackIndex)] = value;
            fallbackIndex += 1;
        }
    }
    return result;
}