@stdlib/string-remove-last NPM

removeLast

Remove the last character(s) of a string.

Installation

npm install @stdlib/string-remove-last

Usage

var removeLast = require( '@stdlib/string-remove-last' );

removeLast( str[, n][, options] )

Removes the last character(s) of an input string.

var out = removeLast( 'last man standing' );
// returns 'last man standin'

out = removeLast( 'Hidden Treasures' );
// returns 'Hidden Treasure'

The function supports the following options:

mode: type of characters to remove. Must be one of the following:
- 'grapheme': grapheme clusters. Appropriate for strings containing visual characters which can span multiple Unicode code points (e.g., emoji).
- 'code_point': Unicode code points. Appropriate for strings containing visual characters which are comprised of more than one Unicode code unit (e.g., ideographic symbols and punctuation and mathematical alphanumerics).
- 'code_unit': UTF-16 code units. Appropriate for strings containing visual characters drawn from the basic multilingual plane (BMP) (e.g., common characters, such as those from the Latin, Greek, and Cyrillic alphabets).
Default: 'grapheme'.

By default, the function returns the last character. To return the last n characters, provide a second argument specifying the number of characters to return.

var out = removeLast( 'foo bar', 4 );
// returns 'foo'

out = removeLast( 'foo bar', 0 );
// returns 'foo bar'

Notes

By default, the function assumes the general case in which an input string may contain an arbitrary number of grapheme clusters. This assumption comes with a performance cost. Accordingly, if an input string is known to only contain visual characters of a particular type (e.g., only alphanumeric), one can achieve better performance by specifying the appropriate mode option.

Examples

var removeLast = require( '@stdlib/string-remove-last' );

var str = removeLast( 'last man standing' );
// returns 'last man standin'

str = removeLast( 'presidential election' );
// returns 'presidential electio'

str = removeLast( 'javaScript' );
// returns 'javaScrip'

str = removeLast( 'Hidden Treasures' );
// returns 'Hidden Treasure'

str = removeLast( 'Lorem ipsum dolor sit amet', 4 );
// returns 'Lorem ipsum dolor sit '

str = removeLast( '🐮🐷🐸🐵', 2 );
// returns '🐮🐷'

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.