Исходники и презентации

lessons/slices_and_arrays/pointer_to_slice_element/main.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"fmt"
+	"runtime"
+)
+
+func printAllocs() {
+	var m runtime.MemStats
+	runtime.ReadMemStats(&m)
+	fmt.Printf("%d MB\n", m.Alloc/1024/1024)
+}
+
+func FindElement(numbers []int, target int) *int {
+	for idx := range numbers {
+		if numbers[idx] == target {
+			return &numbers[idx]
+		}
+	}
+
+	return nil
+}
+
+func main() {
+	var numbers = make([]int, 1<<30)
+	pointer := FindElement(numbers, 0)
+	_ = pointer
+
+	printAllocs()
+	runtime.GC()
+	printAllocs()
+
+	runtime.KeepAlive(pointer)
+}