https://github.com/stdlib-js/assert-is-uppercase
Test if a value is an uppercase string.
https://github.com/stdlib-js/assert-is-uppercase
assert assertion is isuppercase javascript node node-js nodejs stdlib string test uppercase util utilities utility utils valid validate
Last synced: 6 months ago
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Test if a value is an uppercase string.
- Host: GitHub
- URL: https://github.com/stdlib-js/assert-is-uppercase
- Owner: stdlib-js
- License: apache-2.0
- Created: 2021-06-14T13:16:52.000Z (over 4 years ago)
- Default Branch: main
- Last Pushed: 2025-03-24T01:55:04.000Z (8 months ago)
- Last Synced: 2025-04-25T11:46:12.154Z (7 months ago)
- Topics: assert, assertion, is, isuppercase, javascript, node, node-js, nodejs, stdlib, string, test, uppercase, util, utilities, utility, utils, valid, validate
- Language: JavaScript
- Homepage: https://github.com/stdlib-js/stdlib
- Size: 638 KB
- Stars: 3
- 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
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README
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# isUppercase
[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url]
> Test if a value is an uppercase string.
## Installation
```bash
npm install @stdlib/assert-is-uppercase
```
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 isUppercase = require( '@stdlib/assert-is-uppercase' );
```
#### isUppercase( value )
Tests if a `value` is an uppercase `string`.
```javascript
var bool = isUppercase( 'HELLO' );
// returns true
bool = isUppercase( 'salt and light' );
// returns false
```
## Notes
- The function validates that a `value` is a `string`. For all other types, the function returns `false`.
## Examples
```javascript
var isUppercase = require( '@stdlib/assert-is-uppercase' );
var bool = isUppercase( 'HELLO' );
// returns true
bool = isUppercase( '' );
// returns false
bool = isUppercase( 'Hello' );
// returns false
bool = isUppercase( 'hello' );
// returns false
```
* * *
## CLI
## Installation
To use as a general utility, install the CLI package globally
```bash
npm install -g @stdlib/assert-is-uppercase-cli
```
### Usage
```text
Usage: is-uppercase [options] []
Options:
-h, --help Print this message.
-V, --version Print the package version.
--split sep Delimiter for stdin data. Default: '/\\r?\\n/'.
```
### Notes
- If the split separator is a [regular expression][mdn-regexp], ensure that the `split` option is either properly escaped or enclosed in quotes.
```bash
# Not escaped...
$ echo -n $'beEp booP\nFOO' | is-uppercase --split /\r?\n/
# Escaped...
$ echo -n $'beEp booP\nFOO' | is-uppercase --split /\\r?\\n/
```
- The implementation ignores trailing delimiters.
### Examples
```bash
$ is-uppercase BEEP
true
```
To use as a [standard stream][standard-streams],
```bash
$ echo -n 'boop' | is-uppercase
false
```
By default, when used as a [standard stream][standard-streams], the implementation assumes newline-delimited data. To specify an alternative delimiter, set the `split` option.
```bash
$ echo -n 'BEEP\tBoop' | is-uppercase --split '\t'
true
false
```
* * *
## See Also
- [`@stdlib/assert-is-lowercase`][@stdlib/assert/is-lowercase]: test if a value is a lowercase string.
- [`@stdlib/assert-is-string`][@stdlib/assert/is-string]: test if a value is a string.
* * *
## 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 © 2016-2025. The Stdlib [Authors][stdlib-authors].
[npm-image]: http://img.shields.io/npm/v/@stdlib/assert-is-uppercase.svg
[npm-url]: https://npmjs.org/package/@stdlib/assert-is-uppercase
[test-image]: https://github.com/stdlib-js/assert-is-uppercase/actions/workflows/test.yml/badge.svg?branch=main
[test-url]: https://github.com/stdlib-js/assert-is-uppercase/actions/workflows/test.yml?query=branch:main
[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/assert-is-uppercase/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/assert-is-uppercase?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/assert-is-uppercase#cli
[cli-url]: https://github.com/stdlib-js/assert-is-uppercase/tree/cli
[@stdlib/assert-is-uppercase]: https://github.com/stdlib-js/assert-is-uppercase/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/assert-is-uppercase/tree/deno
[deno-readme]: https://github.com/stdlib-js/assert-is-uppercase/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/assert-is-uppercase/tree/umd
[umd-readme]: https://github.com/stdlib-js/assert-is-uppercase/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/assert-is-uppercase/tree/esm
[esm-readme]: https://github.com/stdlib-js/assert-is-uppercase/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/assert-is-uppercase/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/assert-is-uppercase/main/LICENSE
[standard-streams]: https://en.wikipedia.org/wiki/Standard_streams
[mdn-regexp]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions
[@stdlib/assert/is-lowercase]: https://github.com/stdlib-js/assert-is-lowercase
[@stdlib/assert/is-string]: https://github.com/stdlib-js/assert-is-string