@stdlib/assert-is-uppercase

Test if a value is an uppercase string.

Usage no npm install needed!

<script type="module">
  import stdlibAssertIsUppercase from 'https://cdn.skypack.dev/@stdlib/assert-is-uppercase';
</script>

README

isUppercase

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Test if a value is an uppercase string.

Installation

npm install @stdlib/assert-is-uppercase

Usage

var isUppercase = require( '@stdlib/assert-is-uppercase' );

isUppercase( value )

Tests if a value is an uppercase string.

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

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 the module as a general utility, install the module globally

npm install -g @stdlib/assert-is-uppercase

Usage

Usage: is-uppercase [options] [<string>]

Options:

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

Examples

$ is-uppercase BEEP
true

To use as a standard stream,

$ echo -n 'boop' | is-uppercase
false

Notice

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.

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License

See LICENSE.

Copyright

Copyright © 2016-2021. The Stdlib Authors.