time-to-botec

Benchmark sampling in different programming languages
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from_iterator.js (1621B)

      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 isArrayLikeObject = require( '@stdlib/assert/is-array-like-object' );
     24 var isComplexLike = require( '@stdlib/assert/is-complex-like' );
     25 var real = require( '@stdlib/complex/real' );
     26 var imag = require( '@stdlib/complex/imag' );
     27 
     28 
     29 // MAIN //
     30 
     31 /**
     32 * Returns an array of iterated values.
     33 *
     34 * @private
     35 * @param {Object} it - iterator
     36 * @returns {(Array|TypeError)} array or an error
     37 */
     38 function fromIterator( it ) {
     39 	var out;
     40 	var v;
     41 	var z;
     42 
     43 	out = [];
     44 	while ( true ) {
     45 		v = it.next();
     46 		z = v.value;
     47 		if ( z ) {
     48 			if ( isArrayLikeObject( z ) && z.length >= 2 ) {
     49 				out.push( z[ 0 ], z[ 1 ] );
     50 			} else if ( isComplexLike( z ) ) {
     51 				out.push( real( z ), imag( z ) );
     52 			} else {
     53 				return new TypeError( 'invalid argument. An iterator must return either a two-element array containing real and imaginary components or a complex number. Value: `'+z+'`.' );
     54 			}
     55 		}
     56 		if ( v.done ) {
     57 			break;
     58 		}
     59 	}
     60 	return out;
     61 }
     62 
     63 
     64 // EXPORTS //
     65 
     66 module.exports = fromIterator;