isUppercase

Test if a value is an uppercase string.

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

Usage

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

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, ensure that the split option is either properly escaped or enclosed in quotes.

# 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

$ is-uppercase BEEP
true

To use as a standard stream,

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

By default, when used as a standard stream, the implementation assumes newline-delimited data. To specify an alternative delimiter, set the split option.

$ echo -n 'BEEP\tBoop' | is-uppercase --split '\t'
true
false