eval

Alias for eval global.

Usage

var evil = require( '@stdlib/utils/eval' );

evil( str )

Alias for eval global.

var v = evil( '5*4*3*2*1' );
// returns 120 

Notes

• A reference to 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.

Examples

var evil = require( '@stdlib/utils/eval' );

function compile( ctor ) {
	var name;
	var str;

	name = ctor.match( /^(\w*)Array$/ )[ 1 ];
	name = 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;
}

var ctors;
var fcn;
var i;

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

Usage

Usage: jseval [options] code

Options:

  -h,    --help                Print this message.
  -V,    --version             Print the package version.

Examples

$ jseval '5*4*3*2*1'
# => 120