function
boot.janet on line 1394, column 1
(interleave & cols)
Returns an array of the first elements of each col, then the second,
etc.
(interleave [:a :b :c]
[1 2 3]
["x" "y" "z"])
# => @[:a 1 "x" :b 2 "y" :c 3 "z"]