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Replace the substring before the last occurrence of a specified search string.
To use in Observable,
replaceBeforeLast = require( 'https://cdn.jsdelivr.net/gh/stdlib-js/string-base-replace-before-last@umd/browser.js' )The previous example will load the latest bundled code from the umd branch. Alternatively, you may load a specific version by loading the file from one of the tagged bundles. For example,
replaceBeforeLast = require( 'https://cdn.jsdelivr.net/gh/stdlib-js/string-base-replace-before-last@v0.1.1-umd/browser.js' )To vendor stdlib functionality and avoid installing dependency trees for Node.js, you can use the UMD server build:
var replaceBeforeLast = require( 'path/to/vendor/umd/string-base-replace-before-last/index.js' )To include the bundle in a webpage,
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/string-base-replace-before-last@umd/browser.js"></script>If no recognized module system is present, access bundle contents via the global scope:
<script type="text/javascript">
(function () {
window.replaceBeforeLast;
})();
</script>Replaces the substring before the last occurrence of a specified search string.
var str = 'beep boop';
var out = replaceBeforeLast( str, ' ', 'loop', str.length );
// returns 'loop boop'
out = replaceBeforeLast( str, 'o', 'bar', str.length );
// returns 'barop'To begin searching from a specific index, provide a corresponding fromIndex argument.
var out = replaceBeforeLast( 'beep boop beep', ' ', 'loop', 5 );
// returns 'loop boop beep'If fromIndex is less than zero, the starting index is resolved relative to the last string character, with the last string character corresponding to fromIndex = -1.
var out = replaceBeforeLast( 'beep boop beep', ' ', 'loop', -1 );
// returns 'loop beep'- If a search string is not present in a provided string, the function returns the provided string unchanged.
- If a search string is an empty string, the function returns the provided string unchanged.
- If
fromIndexresolves to an index which is less than0, the function returns the provided string unchanged.
<!DOCTYPE html>
<html lang="en">
<body>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/string-base-replace-before-last@umd/browser.js"></script>
<script type="text/javascript">
(function () {
var str = 'beep boop';
var out = replaceBeforeLast( str, 'p', 'see', str.length );
// returns 'seep'
str = 'Hello World!';
out = replaceBeforeLast( str, 'xyz', 'foo', str.length );
// returns 'Hello World!'
str = 'Hello World!';
out = replaceBeforeLast( str, '', 'foo', str.length );
// returns 'Hello World!'
str = '';
out = replaceBeforeLast( str, 'xyz', 'foo', str.length );
// returns ''
})();
</script>
</body>
</html>@stdlib/string-base/replace-after-last: replace the substring after the last occurrence of a specified search string.@stdlib/string-base/replace-after: replace the substring after the first occurrence of a specified search string.@stdlib/string-base/replace-before: replace the substring before the first occurrence of a specified search string.
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.
See LICENSE.
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