add show course and map names

pkg/slices/map.go

@@ -1,17 +0,0 @@
-package slices
-
-// Map slice from one type to another one.
-func Map[S any, E any](s []S, f func(S) E) []E {
-	out := make([]E, len(s))
-	for i := range s {
-		out[i] = f(s[i])
-	}
-
-	return out
-}
-
-func ForEach[S any](s []S, f func(S)) {
-	for i := range s {
-		f(s[i])
-	}
-}