replaceAfterLast

Replace the substring after the last occurrence of a specified search string.

Usage

var replaceAfterLast = require( '@stdlib/string/base/replace-after-last' );

replaceAfterLast( str, search, replacement, fromIndex )

Replaces the substring after the last occurrence of a specified search string.

var str = 'beep boop';
var out = replaceAfterLast( str, ' ', 'loop', str.length );
// returns 'beep loop'

out = replaceAfterLast( str, 'o', 'bar', str.length );
// returns 'beep boobar'

To begin searching from a specific index, provide a corresponding fromIndex argument.

var out = replaceAfterLast( 'beep boop beep', ' ', 'loop', 6 );
// returns 'beep loop'

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 = replaceAfterLast( 'beep boop beep', ' ', 'loop', -1 );
// returns 'beep boop loop'

Notes

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 fromIndex resolves to an index which is less than 0, the function returns the provided string unchanged.

Examples

var replaceAfterLast = require( '@stdlib/string/base/replace-after-last' );

var str = 'beep boop';
var out = replaceAfterLast( str, 'p', 'see', str.length );
// returns 'beep boopsee'

str = 'Hello World!';
out = replaceAfterLast( str, 'xyz', 'foo', str.length );
// returns 'Hello World!'

str = 'Hello World!';
out = replaceAfterLast( str, '', 'foo', str.length );
// returns 'Hello World!'

str = '';
out = replaceAfterLast( str, 'xyz', 'foo', str.length );
// returns ''

str = 'beep boop beep baz';
out = replaceAfterLast( str, 'beep', 'foo', 5 );
// return 'beepfoo'