collapse string?

**sqrt** · 09-17-2012 11:53 AM

Hi. I have to make something to combine two words in their common letters from left to right.
Something like this:
$var a='103333-7'
$var b='103363-0'
$var c='103331-2'
and the result should be '103300-0'
if the character doesn't match it will be replaced with 0.
Many thanks!

**xelawho** · 09-17-2012 02:08 PM

hmm..., it seems there should be a fancier way to do this, but i can't think of it...

Code:

  <script type="text/javascript">
var a='103333-7'
var b='103363-0'
var c='103331-2'
var res =""
for (var i = 0; i < a.length; ++i) {
if (a[i]==b[i]&&b[i]==c[i]){
res+=a[i];
	} else {
res+=0;
	}
}	
alert(res)
	 </script>

**sqrt** · 09-17-2012 04:08 PM

that helps! thanks.. but what if I have n variables ?

**DaveyErwin** · 09-17-2012 08:54 PM

<!doctype html>
<script language="javascript">
var a='103333-7'
var b='103363-0'
var c='103331-2'
var d = '203331-2'
collapse(a,b,c,d)
collapse(a,b)
function collapse(){
var arg = arguments[0];
var res = "";
for(var i=1; i<arguments.length; i++){
res="";
for(var j=0; j<arguments[i].length; j++){
if (arguments[i][j] != arg[j])
res += "0";
else res += arguments[i][j];
}
arg=res;
}
alert(arg)

}

</script>

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