[removed] replace last occurrence of text in a string

Question

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.         


        

Answer 1

Not as elegant as the regex answers above, but easier to follow for the not-as-savvy among us:

function removeLastInstance(badtext, str) {
    var charpos = str.lastIndexOf(badtext);
    if (charpos<0) return str;
    ptone = str.substring(0,charpos);
    pttwo = str.substring(charpos+(badtext.length));
    return (ptone+pttwo);
}

I realize this is likely slower and more wasteful than the regex examples, but I think it might be helpful as an illustration of how string manipulations can be done. (It can also be condensed a bit, but again, I wanted each step to be clear.)