isASCII

Test whether a character belongs to the ASCII character set and whether this is true for all characters in a provided string.

Usage

var isASCII = require( '@stdlib/assert/is-ascii' );

isASCII( value )

Tests whether a character belongs to the ASCII character set and whether this is true for all characters in a provided string.

var bool = isASCII( 'beep' );
// returns true

Notes

For non-string values, the function returns false.

Examples

var isASCII = require( '@stdlib/assert/is-ascii' );

var out = isASCII( 'beep' );
// returns true

out = isASCII( '' );
// returns false

out = isASCII( 'È' );
// returns false

out = isASCII( 123 );
// returns false

CLI

Usage

Usage: is-ascii [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\n123' | is-ascii --split /\r?\n/
# Escaped...
$ echo -n $'beEp\n123' | is-ascii --split /\\r?\\n/

The implementation ignores trailing delimiters.

Examples

$ is-ascii beep
true

To use as a standard stream,

$ echo -n 'beep' | is-ascii
true

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\t123' | is-ascii --split '\t'
true
false