https://github.com/stdlib-js/utils-eval
Alias for eval global.
https://github.com/stdlib-js/utils-eval
cli eval evaluate evil invoke javascript node node-js nodejs run stdlib util utilities utility utils
Last synced: 12 months ago
JSON representation
Alias for eval global.
- Host: GitHub
- URL: https://github.com/stdlib-js/utils-eval
- Owner: stdlib-js
- License: apache-2.0
- Created: 2021-06-13T19:15:28.000Z (over 4 years ago)
- Default Branch: main
- Last Pushed: 2024-12-01T01:59:37.000Z (about 1 year ago)
- Last Synced: 2025-03-02T05:13:20.117Z (12 months ago)
- Topics: cli, eval, evaluate, evil, invoke, javascript, node, node-js, nodejs, run, stdlib, util, utilities, utility, utils
- Language: JavaScript
- Homepage: https://github.com/stdlib-js/stdlib
- Size: 390 KB
- Stars: 2
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md
- Citation: CITATION.cff
- Security: SECURITY.md
Awesome Lists containing this project
README
About stdlib...
We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.
The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.
When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.
To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!
# eval
[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url]
> Alias for [`eval`][mdn-eval] global.
## Installation
```bash
npm install @stdlib/utils-eval
```
Alternatively,
- To load the package in a website via a `script` tag without installation and bundlers, use the [ES Module][es-module] available on the [`esm`][esm-url] branch (see [README][esm-readme]).
- If you are using Deno, visit the [`deno`][deno-url] branch (see [README][deno-readme] for usage intructions).
- For use in Observable, or in browser/node environments, use the [Universal Module Definition (UMD)][umd] build available on the [`umd`][umd-url] branch (see [README][umd-readme]).
- To use as a general utility for the command line, install the corresponding [CLI package][cli-section] globally.
The [branches.md][branches-url] file summarizes the available branches and displays a diagram illustrating their relationships.
To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.
## Usage
```javascript
var evil = require( '@stdlib/utils-eval' );
```
#### evil( str )
Alias for [`eval`][mdn-eval] global.
```javascript
var v = evil( '5*4*3*2*1' );
// returns 120
```
## Notes
- 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.
## Examples
```javascript
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 as a general utility, install the CLI package globally
```bash
npm install -g @stdlib/utils-eval-cli
```
### Usage
```text
Usage: js-eval [options]
Options:
-h, --help Print this message.
-V, --version Print the package version.
```
### Examples
```bash
$ js-eval '5*4*3*2*1'
120
```
* * *
## Notice
This package is part of [stdlib][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][stdlib], see the main project [repository][stdlib].
#### Community
[![Chat][chat-image]][chat-url]
---
## License
See [LICENSE][stdlib-license].
## Copyright
Copyright © 2016-2024. The Stdlib [Authors][stdlib-authors].
[npm-image]: http://img.shields.io/npm/v/@stdlib/utils-eval.svg
[npm-url]: https://npmjs.org/package/@stdlib/utils-eval
[test-image]: https://github.com/stdlib-js/utils-eval/actions/workflows/test.yml/badge.svg?branch=main
[test-url]: https://github.com/stdlib-js/utils-eval/actions/workflows/test.yml?query=branch:main
[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/utils-eval/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/utils-eval?branch=main
[chat-image]: https://img.shields.io/gitter/room/stdlib-js/stdlib.svg
[chat-url]: https://app.gitter.im/#/room/#stdlib-js_stdlib:gitter.im
[stdlib]: https://github.com/stdlib-js/stdlib
[stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors
[cli-section]: https://github.com/stdlib-js/utils-eval#cli
[cli-url]: https://github.com/stdlib-js/utils-eval/tree/cli
[@stdlib/utils-eval]: https://github.com/stdlib-js/utils-eval/tree/main
[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules
[deno-url]: https://github.com/stdlib-js/utils-eval/tree/deno
[deno-readme]: https://github.com/stdlib-js/utils-eval/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/utils-eval/tree/umd
[umd-readme]: https://github.com/stdlib-js/utils-eval/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/utils-eval/tree/esm
[esm-readme]: https://github.com/stdlib-js/utils-eval/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/utils-eval/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/utils-eval/main/LICENSE
[mdn-eval]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/eval