/** * @license Apache-2.0 * * Copyright (c) 2018 The Stdlib Authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ 'use strict'; // MODULES // var factory = require( './factory.js' ); // MAIN // /** * Samples elements from an array-like object. * * @name sample * @type {Function} * @param {ArrayLike} x - array-like object from which to sample * @param {Options} [options] - function options * @param {NonNegativeInteger} [options.size] - sample size * @param {ProbabilityArray} [options.probs] - element probabilities * @param {boolean} [options.replace=true] - boolean indicating whether to sample with replacement * @throws {TypeError} first argument must be array-like * @throws {TypeError} options argument must be an object * @throws {TypeError} must provide valid options * @throws {RangeError} `size` option must be less than or equal to the length of `x` when the `replace` option is `false` * @returns {Array} sample * * @example * var out = sample( [ 3, null, NaN, 'abc', function(){} ] ); * // e.g., returns [ 3, 'abc', null, 3, null ] */ var sample = factory(); // EXPORTS // module.exports = sample;