(map proc list1 list2 ...) procedure

The lists should all have the same length. Proc should accept as many arguments as there are lists and return a single value. Proc should not mutate any of the lists.

The map procedure applies proc element-wise to the elements of the lists and returns a list of the results, in order. Proc is always called in the same dynamic environment as map itself. The order in which proc is applied to the elements of the lists is unspecified. If multiple returns occur from map, the values returned by earlier returns are not mutated.

C'est beau, scheme.