stdlib-js
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About stdlib...
</summary>
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replaceBeforeLast
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Replace the substring before the last occurrence of a specified search string.
bash
npm install @stdlib/string-base-replace-before-last
javascript
var replaceBeforeLast = require( '@stdlib/string-base-replace-before-last' );
#### replaceBeforeLast( str, search, replacement, fromIndex )
Replaces the substring before the last occurrence of a specified search string.
javascript
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.
javascript
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.
javascript
var out = replaceBeforeLast( 'beep boop beep', ' ', 'loop', -1 );
// returns 'loop beep'
fromIndex resolves to an index which is less than 0, the function returns the provided string unchanged.
javascript
var replaceBeforeLast = require( '@stdlib/string-base-replace-before-last' );
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 ''
@stdlib/string-base/replace-after-last][@stdlib/string/base/replace-after-last]: replace the substring after the last occurrence of a specified search string.
- [@stdlib/string-base/replace-after][@stdlib/string/base/replace-after]: replace the substring after the first occurrence of a specified search string.
- [@stdlib/string-base/replace-before][@stdlib/string/base/replace-before]: replace the substring before the first occurrence of a specified search string.
