[RESOLVED] compare an array with itself

jrough

I have a syntax error on the "for" line. I don't know if I'm mixing up arrays and lists but what I want to do is compare each value of $arr one at a time with the array itself. I want to see if any of the values sums to zero.


$arr= array(1,2,3,4,5,6,7,8,-1,-2);


function oc($arr){      

 	while(list($var, $val)= each($arr)){
           for (i=0;i < $arr.length;i++){
            if ($val = $arr[$i]){

           return $val;
          }//end if
        }//end for

}//end while
return false;
}//end function

Derokorian

$arr.length is not valid in php unless you have a constant named length that you are concatenating onto the value of $arr (which I doubt) you probably want to be using [man]count[/man]

jrough

I didn't get rid of the syntax error. It is still on the "for" line.<?php

$arr= array(1,2,3,4,5,6,7,8,-1,-2);


function oc($arr){      

 	while(list($var, $val)= each($arr)){
           for (i=0;i < count($arr);i++){
            if ($val = $arr[$i]){

           return $val;
          }//end if
        }//end for

}//end while
return false;
}//end function

Derokorian

You have no dollar signs in front of the i (all 3 times)

jrough

i's should know they are variables :-), I was doing it first in javascript. tnx

jrough

that is very cool, I will try them both and see which uses less memory.