What is the most efficient way of merging [1,2] and [7,8] into [[1,7], [2,8]]

Question

Given 2 arrays [1,2] and [7,8] what is the most efficient way of merging that to form [[1,7], [2,8]]. I know we can do this:

a1 = [1,2], a2 = [7,8], a3=[];
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Answer 1

You are basically searching for a function identical to Python's zip function, so check out the answers to an older SO question:

Javascript equivalent of Python's zip function