JavaScript: replace last occurrence of text in a string

javascript string replace
Ruth picture Ruth · Apr 28, 2010 · Viewed 126.9k times · Source

See my code snippet below:

var list = ['one', 'two', 'three', 'four'];
var str = 'one two, one three, one four, one';
for ( var i = 0; i < list.length; i++)
{
     if (str.endsWith(list[i])
     {
         str = str.replace(list[i], 'finish')
     }
 }

I want to replace the last occurrence of the word one with the word finish in the string, what I have will not work because the replace method will only replace the first occurrence of it. Does anyone know how I can amend that snippet so that it only replaces the last instance of 'one'

Answer

Pointy picture Pointy · Apr 28, 2010

Well, if the string really ends with the pattern, you could do this:

str = str.replace(new RegExp(list[i] + '$'), 'finish');

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