.indexOf() method

[dabush]

ok, as we all know, the syntax for this method is

string.indexOf(x,y);
(where you find the first x starting with position y).

well, my question is, how do you find the first x before the position y?

[khalidali63]

If I understand it correctly,

string.indexOf("x")

will return the first instance of the 'X" in the calling string.

when you provide an index as in your example it restricts it to find the "X" from the index y and beyond.

Cheers

Khalid

[dabush]

ugh. i know that. thats exactly what i said? i want to know how to find x from Y and before (not beyond)

[dabush]

i came up with my own way to do this. You can use it if you want. Compare this.

This is to find string x AFTER position y in the string called string
string.indexOf(x,y);

This is to find stringx BEFORE position y in the string called string
findBefore(string,x,y);
when you have the following in your script

function findBefore(string,x,y)
{
var reversed = reverse(string);
var backindex = reversed.indexOf(reverse(x),(string.length-y)) + x.length;
var fixindex = string.length - backindex;
return fixindex;
}
function reverse(string)
{
var newstr = '';
for (var loop = 1; loop <= string.length; loop++)
{
newstr += string.charAt(string.length-loop);
}
return newstr;
}

try it. it works

[dabush]

whoah. ur smart. y didnt u say something earlier. thanks.

[dabush]

never mind, that dont do it. it finds the first x in the string before y. but i want it to find the x before y and closest to y.

[Timbuck2]

<grin>
Current Score
Dave = genious
Dave = da
Dave = Super Genius

Not bad for a days work