@stdlib/string-ends-with

Test if a string ends with the characters of another string.

Usage no npm install needed!

<script type="module">
  import stdlibStringEndsWith from 'https://cdn.skypack.dev/@stdlib/string-ends-with';
</script>

README

endsWith

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Test if a string ends with the characters of another string.

Installation

npm install @stdlib/string-ends-with

Usage

var endsWith = require( '@stdlib/string-ends-with' );

endsWith( str, search[, len] )

Tests if a string ends with the characters of another string.

var str = 'Remember the story I used to tell you when you were a boy?';

var bool = endsWith( str, 'boy?' );
// returns true

bool = endsWith( str, 'Boy?' );
// returns false

To search for a match at the end of a substring, provide a len argument. If len is positive, the function restricts the search to a substring with length len, beginning with the leftmost character. If len is negative, len indicates to ignore the last len characters (equivalent of str.length + len).

var str = 'To be, or not to be, that is the question.';

var bool = endsWith( str, 'to be', 19 );
// returns true

bool = endsWith( str, 'to be', -23 );
// returns true

If provided an empty search string, the function always returns true.

var str = 'beep boop';

var bool = endsWith( str, '' );
// returns true

Examples

var endsWith = require( '@stdlib/string-ends-with' );

var bool;
var str;

str = 'Fair is foul, and foul is fair, hover through fog and filthy air';

bool = endsWith( str, 'air' );
// returns true

bool = endsWith( str, 'fair' );
// returns false

bool = endsWith( str, 'fair', 30 );
// returns true

bool = endsWith( str, 'fair', -34 );
// returns true

CLI

Installation

To use the module as a general utility, install the module globally

npm install -g @stdlib/string-ends-with

Usage

Usage: ends-with [options] --search=<string> [<string>]

Options:

  -h,    --help                Print this message.
  -V,    --version             Print the package version.
         --search string       Search string.
         --len int             Substring length.
         --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 
    
    Hello, World!\nBeep Boop Baz' | ends-with --search=Beep --split /\r?\n/
    
    # Escaped...
    $ echo -n 
    
    Hello, World!\nBeep Boop Baz' | ends-with --search=Beep --split /\\r?\\n/
    
  • The implementation ignores trailing delimiters.

Examples

$ ends-with --search=ep beep
true

To use as a standard stream,

$ echo -n 'boop' | ends-with --search=ep
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 'Hello, World!\tBeep Boop' | ends-with --search=Boop --split '\t'
false
true

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.

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License

See LICENSE.

Copyright

Copyright © 2016-2022. The Stdlib Authors.