Package Exports
- @stdlib/utils-eval
- @stdlib/utils-eval/lib/index.js
This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@stdlib/utils-eval) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.
Readme
eval
Alias for
evalglobal.
Installation
npm install @stdlib/utils-evalUsage
var evil = require( '@stdlib/utils-eval' );evil( str )
Alias for eval global.
var v = evil( '5*4*3*2*1' );
// returns 120Notes
- A reference to
evalis treated differently by the compiler. For example, when evaluating code containing block-scoped declarations (e.g.,let,const,function,class), the compiler may throw anerrorcomplaining that block-scoped declarations are not yet supported outside ofstrict mode. One possible workaround is to include"use strict";in the evaluated code, as done in the example below.
Examples
var evil = require( '@stdlib/utils-eval' );
var ctors;
var fcn;
var i;
function compile( ctor ) {
var name;
var str;
name = ctor.match( /^(\w*)Array$/ )[ 1 ];
name += 'DataArray';
str = '';
str += '(function create(){';
str += '"use strict";';
str += 'class '+name+' extends '+ctor+'{';
str += 'constructor(x){';
str += 'super(x);';
str += '}';
str += '}';
str += 'return '+name+';';
str += '})();';
return str;
}
ctors = [
'Int8Array',
'Uint8Array',
'Uint8ClampedArray',
'Int16Array',
'Uint16Array',
'Int32Array',
'Uint32Array',
'Float32Array',
'Float64Array',
'Array'
];
for ( i = 0; i < ctors.length; i++ ) {
fcn = evil( compile( ctors[i] ) );
console.log( fcn.toString() );
}CLI
Installation
To use the module as a general utility, install the module globally
npm install -g @stdlib/utils-evalUsage
Usage: js-eval [options] <code>
Options:
-h, --help Print this message.
-V, --version Print the package version.Examples
$ js-eval '5*4*3*2*1'
120Notice
This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
Community
License
See LICENSE.
Copyright
Copyright © 2016-2022. The Stdlib Authors.