time-to-botec

Benchmark sampling in different programming languages
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main.js (1793B)

      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 nativeClass = require( './../../native-class' );
     24 var RE = require( '@stdlib/regexp/function-name' ).REGEXP;
     25 var isBuffer = require( '@stdlib/assert/is-buffer' );
     26 
     27 
     28 // MAIN //
     29 
     30 /**
     31 * Determines the name of a value's constructor.
     32 *
     33 * @param {*} v - input value
     34 * @returns {string} name of a value's constructor
     35 *
     36 * @example
     37 * var v = constructorName( 'a' );
     38 * // returns 'String'
     39 *
     40 * @example
     41 * var v = constructorName( 5 );
     42 * // returns 'Number'
     43 *
     44 * @example
     45 * var v = constructorName( null );
     46 * // returns 'Null'
     47 *
     48 * @example
     49 * var v = constructorName( undefined );
     50 * // returns 'Undefined'
     51 *
     52 * @example
     53 * var v = constructorName( function noop() {} );
     54 * // returns 'Function'
     55 */
     56 function constructorName( v ) {
     57 	var match;
     58 	var name;
     59 	var ctor;
     60 	name = nativeClass( v ).slice( 8, -1 );
     61 	if ( (name === 'Object' || name === 'Error') && v.constructor ) {
     62 		ctor = v.constructor;
     63 		if ( typeof ctor.name === 'string' ) {
     64 			return ctor.name;
     65 		}
     66 		match = RE.exec( ctor.toString() );
     67 		if ( match ) {
     68 			return match[ 1 ];
     69 		}
     70 	}
     71 	if ( isBuffer( v ) ) {
     72 		return 'Buffer';
     73 	}
     74 	return name;
     75 }
     76 
     77 
     78 // EXPORTS //
     79 
     80 module.exports = constructorName;