Compare 1d array elements and only output unique values

[OJwithPulp]

So more precisely this is the type of vi I've been trying to figure out.

If my input 1D Array String is:        A1, A1, A2, A2, A3, W4, W4  

It will output:                                   A3

any ideas or links that can help me are appreciated.

[altenbach]

What have you tried so far?

Is the array always sorted?

Try variant attributes! 😄

[OJwithPulp]

I've tried manipulating delete duplicate vi's to try and take out not just one, but both elements if they match to no avail.

and yes I use the sort 1D array to make sure the array is always sorted.

[paul_cardinale · Accepted solution]

[ben64 · Accepted solution]

The Search Array_ogtk.vi (from the OpenG Toolkit) returns an array of the indices that match the search element. If the returned indices array size is 1 then the element is unique. You can use this with conditional indexing output of a FOR loop. This can also be optimize for large array by sorting the input array and using the last index found as the start index of the Search Array_ogtk.vi for the next loop iteration.

Ben64

Ben64

[OJwithPulp]

Thanks for all your help guys! I ended up finding a workaround using some DB Tools and item name property nodes to get my two multi-column list-boxes communicating properly.

However, I tried out both of your solutions and they worked like a charm! 

Also didn't know about the OpenG Toolkit before this, I'll have to continue exploring what else it has included with it