time-to-botec

Benchmark sampling in different programming languages
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README.md (2877B)

      1 <!--
      2 
      3 @license Apache-2.0
      4 
      5 Copyright (c) 2018 The Stdlib Authors.
      6 
      7 Licensed under the Apache License, Version 2.0 (the "License");
      8 you may not use this file except in compliance with the License.
      9 You may obtain a copy of the License at
     10 
     11    http://www.apache.org/licenses/LICENSE-2.0
     12 
     13 Unless required by applicable law or agreed to in writing, software
     14 distributed under the License is distributed on an "AS IS" BASIS,
     15 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     16 See the License for the specific language governing permissions and
     17 limitations under the License.
     18 
     19 -->
     20 
     21 # eval
     22 
     23 > Alias for [`eval`][mdn-eval] global.
     24 
     25 <section class="usage">
     26 
     27 ## Usage
     28 
     29 ```javascript
     30 var evil = require( '@stdlib/utils/eval' );
     31 ```
     32 
     33 #### evil( str )
     34 
     35 Alias for [`eval`][mdn-eval] global.
     36 
     37 ```javascript
     38 var v = evil( '5*4*3*2*1' );
     39 // returns 120
     40 ```
     41 
     42 </section>
     43 
     44 <!-- /.usage -->
     45 
     46 <section class="notes">
     47 
     48 ## Notes
     49 
     50 -   A reference to [`eval`][mdn-eval] **is** treated differently by the compiler. For example, when evaluating code containing block-scoped declarations (e.g., `let`, `const`, `function`, `class`), the compiler may throw an `error` complaining that block-scoped declarations are **not** yet supported outside of `strict mode`. One possible workaround is to include `"use strict";` in the evaluated code, as done in the example below.
     51 
     52 </section>
     53 
     54 <!-- /.notes -->
     55 
     56 <section class="examples">
     57 
     58 ## Examples
     59 
     60 <!-- eslint no-undef: "error" -->
     61 
     62 ```javascript
     63 var evil = require( '@stdlib/utils/eval' );
     64 
     65 var ctors;
     66 var fcn;
     67 var i;
     68 
     69 function compile( ctor ) {
     70     var name;
     71     var str;
     72 
     73     name = ctor.match( /^(\w*)Array$/ )[ 1 ];
     74     name += 'DataArray';
     75 
     76     str = '';
     77     str += '(function create(){';
     78     str += '"use strict";';
     79     str += 'class '+name+' extends '+ctor+'{';
     80     str += 'constructor(x){';
     81     str += 'super(x);';
     82     str += '}';
     83     str += '}';
     84     str += 'return '+name+';';
     85     str += '})();';
     86     return str;
     87 }
     88 
     89 ctors = [
     90     'Int8Array',
     91     'Uint8Array',
     92     'Uint8ClampedArray',
     93     'Int16Array',
     94     'Uint16Array',
     95     'Int32Array',
     96     'Uint32Array',
     97     'Float32Array',
     98     'Float64Array',
     99     'Array'
    100 ];
    101 
    102 for ( i = 0; i < ctors.length; i++ ) {
    103     fcn = evil( compile( ctors[i] ) );
    104     console.log( fcn.toString() );
    105 }
    106 ```
    107 
    108 </section>
    109 
    110 <!-- /.examples -->
    111 
    112 * * *
    113 
    114 <section class="cli">
    115 
    116 ## CLI
    117 
    118 <section class="usage">
    119 
    120 ### Usage
    121 
    122 ```text
    123 Usage: js-eval [options] <code>
    124 
    125 Options:
    126 
    127   -h,    --help                Print this message.
    128   -V,    --version             Print the package version.
    129 ```
    130 
    131 </section>
    132 
    133 <!-- /.usage -->
    134 
    135 <section class="examples">
    136 
    137 ### Examples
    138 
    139 ```bash
    140 $ js-eval '5*4*3*2*1'
    141 120
    142 ```
    143 
    144 </section>
    145 
    146 <!-- /.examples -->
    147 
    148 </section>
    149 
    150 <!-- /.cli -->
    151 
    152 <section class="links">
    153 
    154 [mdn-eval]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/eval
    155 
    156 </section>
    157 
    158 <!-- /.links -->