Hi Monks,

I have four arrays (A, B, C, and D). Each array has been compared against the others to find pairs of items between all 6 combinations (e.g. A v B, A v C...). My problem is that I can't find a simple way to find lists of things e.g. which match each other in A, B and C but not in D, for example, where item A1 is paired to B2, and B2 is paired to C3 and C3 is paired to A1, but there is not an equivalent pair in D. This is getting very confusing for me and my code is getting long and complicated, can someone please suggest a nice way to do this?

Let me know if the problem isn't clear!

Here is an example of the data, all comparison files have been split in two, giving 12 arrays. The first element in @A_v_B1 is paired with the first element of @A_v_B2 etc

. This example shows pairwise comparison of A,B and C only, A101 matches B302, which both match C302. 

@A_v_B1       @A_v_B2

A101               B302
A103               B405
A104               B406


@A_v_C1      @A_v_C2

A101               C302
A106               C305  
A109               C306


@B_v_C1     @B_v_C2
 
B302               C302
B103               C415
B104               C416

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In reply to confusing array comparison by Anonymous Monk

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