Arrays problem

Anon

I have two array

$a=(3, 44, 5, 6, 6, 7);
$b=(a, b, q, r, r, d);

each number in the first array corresponds to a letter in the 2nd array. how can I get rid of similar terms. For example 6 and r are double. I want to get rid of one pair.

jcarver

First, make them associative arrays (faster way to do this anyone?)

foreach($a as $idx=>$aValue) {
$c[$aValue] = $b[$idx];
}
Then, get rid of copies.
foreach($c as $idx=>$cVal) {
if(!isset($d[$idx])) {
$d[$idx] = $cVal;
}
}

Now $d holds an associative array where the first set is pointing to the second set...

Jason

Anon

Well, you are on the right track, but I would just like to point out that the foreach loop is unnecessary because when, in your example, you are creating the array $c, any duplicates will have the same key, and thus merely overwrite the value before it, eliminating any duplicates in the process. Just trying to keep it simple 🙂

Hope that helps!

Chris King

jcarver

Hehe, oops!

Thanks for that catch. It must have been kinda late...

~Jason