update: slices 23th exercise

16-slices/exercises/23-limit-the-backing-array-sharing/api/api.go

@@ -1,13 +1,25 @@
 package api
 
+// note: "client" means the users or importers of your package.
+
+// The original temperatures slice.
 var temps = []int{5, 10, 3, 25, 45, 80, 90}
 
+//                ^  ^   ^  ^           ^
+//                |  |   |  +-----------+
+// the client is allowed to |
+// change these elements.   |
+//                          |
+// but the client shouldn't change the
+// rest of the elements after the 3rd element.
+
 // Read returns a range of temperature readings beginning from
 // the `start` until to the `stop`.
 func Read(start, stop int) []int {
 	// ----------------------------------------
 	// RESTRICTIONS — ONLY ADD YOUR CODE HERE
 
+	// returns a slice from the temps slice to the client.
 	portion := temps[start:stop]
 
 	// ----------------------------------------