es-next-tools/dist/object/filter.js

A comprehensive utility library for JavaScript and TypeScript that provides a wide range of functions for common programming tasks, including mathematical operations, date manipulations, array and object handling, string utilities, and more.

/**
 * Filters an object based on a predicate function.
 * @param {T} object - The object to filter.
 * @param {Function} predicate - The function to test each entry of the object.
 * @returns A new object with entries that passed the test.
 * @example
 * const obj = { a: 1, b: 2, c: 3, d: 4 };
 * const filtered = filter(obj, ([key, value]) => value % 2 === 0);
 * // { b: 2, d: 4 }
 */
export function filter(object, predicate) {
    const result = {};
    for (const key in object) {
        if (Object.prototype.hasOwnProperty.call(object, key)) {
            const value = object[key];
            if (predicate([key, value])) {
                result[key] = value;
            }
        }
    }
    ;
    return result;
}