update: slice exercise 21

16-slices/exercises/21-correct-the-lyric/main.go

@@ -23,13 +23,23 @@ import (
 //
 // STEPS
 //
+//  INITIAL SLICE:
+//    [all my troubles seemed so far away oh i believe in yesterday now it looks as though they are here to stay]
+//
+//
 //  1. Prepend "yesterday" to the `lyric` slice.
 //
+//     RESULT SHOULD BE:
+//     [yesterday all my troubles seemed so far away oh i believe in yesterday now it looks as though they are here to stay]
+//
+//
 //  2. Put the words to the correct positions in the `lyric` slice.
 //
-//  3. Print the `lyric` slice.
+//     RESULT SHOULD BE:
+//     [yesterday all my troubles seemed so far away now it looks as though they are here to stay oh i believe in yesterday]
 //
-//     HINT: You don't need use the "yesterday" word from the `lyric` slice.
+//
+//  3. Print the `lyric` slice.
 //
 //
 // BONUS
@@ -38,6 +48,22 @@ import (
 //
 //   + Check whether your conclusions are correct.
 //
+//
+// HINTS
+//
+//   Only look at this if you get stuck.
+//
+//   You can use the following slice operations to solve the exercise.
+//
+//   + Prepends "value" to the slice:
+//     slice = append([]string{"value"}, slice...)
+//
+//   + Appends some part (N to M) of the same slice to itself:
+//     slice = append(slice, slice[N:M]...)
+//
+//   + Copies the last part of the slice starting from M to the first part of the slice until N:
+//     slice = append(slice[:N], slice[M:]...)
+//
 // ---------------------------------------------------------
 
 func main() {