isLowercase

Test if a value is a lowercase string.

Installation

npm install @stdlib/assert-is-lowercase

Usage

var isLowercase = require( '@stdlib/assert-is-lowercase' );

isLowercase( value )

Tests if a value is a lowercase string.

var bool = isLowercase( 'salt and light' );
// returns true

bool = isLowercase( 'HELLO' );
// returns false

bool = isLowercase( 'World' );
// returns false

Notes

• This function validates that a value is a string. For all other types, the function returns false.

Examples

var isLowercase = require( '@stdlib/assert-is-lowercase' );

var bool = isLowercase( 'hello' );
// returns true

bool = isLowercase( '' );
// returns false

bool = isLowercase( 'Hello' );
// returns false

bool = isLowercase( 'HELLO' );
// returns false

See Also

• @stdlib/assert-is-lowercase-cli: CLI package for use as a command-line utility.
• @stdlib/assert-is-string: test if a value is a string.
• @stdlib/assert-is-uppercase: test if a value is an uppercase string.

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.

Community

License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.