Peach on a dyadic function

Question

I have two lists (with atoms of different types) and would like to apply a custom dyadic function in parallel, i.e. first element of the list a with first element of the list b etc.. The non-parallel way is to use the iterator ', which works just fine, but what is the parallel alternative?

Answer 1

You can avoid having to flip your data, which can be expensive, by composing the peach with each both

q) f:{x+y}
q) l1: 1 2 3
q) l2: 4 5 6
q) (f':)'[l1;l2]
5 7 9
q)\t:100000 (f':)'[l1;l2]
97
q)\t:100000 (f .) peach flip(l1;l2)
141

Without the peach this would just be a simple f'[l1;l2]