chickadee » generalized-arrays » array-map!

array-map! proc array #!rest arraysprocedure

It is an error if the arrays do not all have the same bounds. For each valid index value, proc is invoked, passing each corresponding element of the arrays. Whatever proc returns becomes the value of the storage element corresponding to that index in the first specified array. The order of invocations of proc is not specified. Returns an undefined value.