'init'

main/pg.go

@@ -0,0 +1,26 @@
+package main
+
+import "fmt"
+
+func main() {
+	var a [7]int = [7]int{4, 5, 6, 6, 4, 7, 7}
+	var slice []int = a[2:4]
+	fmt.Println(len(slice))
+	slice2 := append(slice, 55, 55)
+	fmt.Println(slice2)
+	fmt.Println(len(slice2))
+	//默认分配10个空间
+	var ip map[int]string
+	//key不能重复,前面会替换后面那个 value 可以重复
+	ip = make(map[int]string, 10)
+	ip[103883] = "张三"
+	ip[173718] = "李四"
+
+	ip[173718] = "李"
+	fmt.Println(ip)
+	//查找
+	value, flag := ip[103883]
+	fmt.Println(value)
+	fmt.Println(flag)
+	fmt.Println(len(ip))
+}