removeLast
Remove the last character(s) of a string.
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
modeoption.
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 '🐮🐷'
CLI
Usage
Usage: remove-last [options] [<string>]
Options:
-h, --help Print this message.
-V, --version Print the package version.
--n Number of characters to remove. Default: 1.
--split sep Delimiter for stdin data. Default: '/\\r?\\n/'.
--mode mode Type of character to remove. Default: 'grapheme'.
Notes
If the split separator is a regular expression, ensure that the
splitoption is either properly escaped or enclosed in quotes.# Not escaped... $ echo -n $'beep\nboop' | remove-last --split /\r?\n/ # Escaped... $ echo -n $'beep\nboop' | remove-last --split /\\r?\\n/The implementation ignores trailing delimiters.
Examples
$ remove-last beep
bee
To use as a standard stream,
$ echo -n 'beep\nboop' | remove-last --n 2
be
bo
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' | remove-last --split '\t'
bee
boo