@tienedev/datype/dist/cjs/pick/index.cjs

Modern TypeScript utility library with pragmatic typing and zero dependencies

'use strict';

/**
 * Creates a new object with only the specified keys from the source object.
 * Provides perfect TypeScript type inference for the resulting object.
 *
 * @param obj - The source object to pick from
 * @param keys - Array of keys to pick from the source object
 * @returns A new object containing only the specified keys
 *
 * @example
 * ```typescript
 * const user = { id: 1, name: 'John', email: 'john@example.com', age: 30 };
 * const basicInfo = pick(user, ['id', 'name']);
 * // Result: { id: 1, name: 'John' }
 * // Type: { id: number; name: string }
 * ```
 */
function pick(obj, keys) {
    if (typeof obj !== 'object' || obj === null) {
        throw new TypeError('First argument must be an object');
    }
    if (!Array.isArray(keys)) {
        throw new TypeError('Second argument must be an array of keys');
    }
    const result = {};
    for (const key of keys) {
        if (key in obj) {
            result[key] = obj[key];
        }
    }
    return result;
}

exports.pick = pick;