/** * @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 abs = require( '@stdlib/math/base/special/abs' ); var incrmax = require( './../../../incr/max' ); // MAIN // /** * Returns an accumulator function which incrementally computes a maximum absolute value. * * @returns {Function} accumulator function * * @example * var accumulator = incrmaxabs(); * * var max = accumulator(); * // returns null * * max = accumulator( 3.14 ); * // returns 3.14 * * max = accumulator( -5.0 ); * // returns 5.0 * * max = accumulator( 10.1 ); * // returns 10.1 * * max = accumulator(); * // returns 10.1 */ function incrmaxabs() { var max = incrmax(); return accumulator; /** * If provided a value, the accumulator function returns an updated maximum absolute value. If not provided a value, the accumulator function returns the current maximum absolute value. * * @private * @param {number} [x] - new value * @returns {(number|null)} maximum absolute value or null */ function accumulator( x ) { if ( arguments.length === 0 ) { return max(); } return max( abs( x ) ); } } // EXPORTS // module.exports = incrmaxabs;