time-to-botec

Benchmark sampling in different programming languages
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try_catch_async.js (2222B)

      1 /**
      2 * @license Apache-2.0
      3 *
      4 * Copyright (c) 2018 The Stdlib Authors.
      5 *
      6 * Licensed under the Apache License, Version 2.0 (the "License");
      7 * you may not use this file except in compliance with the License.
      8 * You may obtain a copy of the License at
      9 *
     10 *    http://www.apache.org/licenses/LICENSE-2.0
     11 *
     12 * Unless required by applicable law or agreed to in writing, software
     13 * distributed under the License is distributed on an "AS IS" BASIS,
     14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     15 * See the License for the specific language governing permissions and
     16 * limitations under the License.
     17 */
     18 
     19 'use strict';
     20 
     21 // MODULES //
     22 
     23 var isFunction = require( '@stdlib/assert/is-function' );
     24 
     25 
     26 // MAIN //
     27 
     28 /**
     29 * If a function does not return an error, invokes a callback with the function result; otherwise, invokes a callback with a value `y`.
     30 *
     31 * @param {Function} x - function to invoke
     32 * @param {*} y - value to return if `x` returns an error
     33 * @param {Function} done - callback to invoke upon completion
     34 * @throws {TypeError} first argument must be a function
     35 * @throws {TypeError} last argument must be a function
     36 *
     37 * @example
     38 * var randu = require( '@stdlib/random/base/randu' );
     39 *
     40 * function x( clbk ) {
     41 *     setTimeout( onTimeout, 0 );
     42 *     function onTimeout() {
     43 *         if ( randu() > 0.5 ) {
     44 *             return clbk( null, 1.0 );
     45 *         }
     46 *         clbk( new Error( 'beep' ) );
     47 *     }
     48 * }
     49 *
     50 * function done( error, result ) {
     51 *     if ( error ) {
     52 *         console.log( error.message );
     53 *     }
     54 *     console.log( result );
     55 * }
     56 *
     57 * trycatchAsync( x, -1.0, done );
     58 */
     59 function trycatchAsync( x, y, done ) {
     60 	if ( !isFunction( x ) ) {
     61 		throw new TypeError( 'invalid argument. First argument must be a function. Value: `'+x+'`.' );
     62 	}
     63 	if ( !isFunction( done ) ) {
     64 		throw new TypeError( 'invalid argument. Last argument must be a function. Value: `'+done+'`.' );
     65 	}
     66 	x( clbk );
     67 
     68 	/**
     69 	* Callback invoked by `x`.
     70 	*
     71 	* @private
     72 	* @param {(Error|null)} error - error object
     73 	* @param {*} result - result
     74 	* @returns {void}
     75 	*/
     76 	function clbk( error, result ) {
     77 		if ( error ) {
     78 			return done( error, y );
     79 		}
     80 		done( null, result );
     81 	}
     82 }
     83 
     84 
     85 // EXPORTS //
     86 
     87 module.exports = trycatchAsync;