Исходники и презентации

lessons/slices_and_arrays/slice_operations/main.go

@@ -0,0 +1,58 @@
+package main
+
+import (
+	"fmt"
+)
+
+func accessToElement1() {
+	data := make([]int, 3)
+	fmt.Println(data[4]) // panic
+}
+
+func accessToElement2() {
+	data := make([]int, 3, 6)
+	fmt.Println(data[4]) // panic
+}
+
+func accessToElement3() {
+	data := make([]int, 3, 6)
+	_ = data[-1] // compilation error
+}
+
+func accessToNilSlice1() {
+	var data []int
+	_ = data[0] // panic
+}
+
+func accessToNilSlice2() {
+	var data []int
+	data[0] = 10 // panic
+}
+
+func appendToNilSlice() {
+	var data []int
+	data = append(data, 10)
+}
+
+func rangeByNilSlice() {
+	var data []int
+	for range data {
+	}
+}
+
+func makeZeroSlice() {
+	data := make([]int, 0)
+	fmt.Println(len(data)) // 0
+	fmt.Println(cap(data)) // 0
+}
+
+func makeSlice() {
+	_ = make([]int, -5)    // compilation error
+	_ = make([]int, 10, 5) // compilation error
+
+	size := -5
+	_ = make([]int, size) // panic
+
+	size = 5
+	_ = make([]int, size*2, size) // panic
+}