add: slice adv. ops. exercises

16-slices/exercises/24-fix-the-memory-leak/solution/api/api.go

@@ -0,0 +1,24 @@
+package api
+
+import (
+	"fmt"
+	"math/rand"
+	"runtime"
+)
+
+// DO NOT TOUCH THE FOLLOWING CODE
+// THIS IS THE API
+// YOU CANNOT CONTROL IT! :)
+
+// Read returns a huge slice (allocates ~65 MB of memory)
+func Read() []int {
+	return rand.Perm(2 << 22)
+}
+
+// Report cleans the memory and prints the current memory usage
+func Report() {
+	var m runtime.MemStats
+	runtime.GC()
+	runtime.ReadMemStats(&m)
+	fmt.Printf(" > Memory Usage: %v KB\n", m.Alloc/1024)
+}