修复代码的格式

2.6.md

@@ -234,44 +234,44 @@ interface的变量可以持有任意实现该interface类型的对象，这给
 
 	让我们通过一个例子来更加深入的理解。
 
-	package main
+		package main
 
-	import (
+		import (
-		"fmt"
+			"fmt"
-		"strconv"
+			"strconv"
-	)
+		)
 
-	type Element interface{}
+		type Element interface{}
-	type List [] Element
+		type List [] Element
 
-	type Person struct {
+		type Person struct {
-		name string
+			name string
-		age int
+			age int
-	}
+		}
 
-	//定义了String方法，实现了fmt.Stringer
+		//定义了String方法，实现了fmt.Stringer
-	func (p Person) String() string {
+		func (p Person) String() string {
-		return "(name: " + p.name + " - age: "+strconv.Itoa(p.age)+ " years)"
+			return "(name: " + p.name + " - age: "+strconv.Itoa(p.age)+ " years)"
-	}
+		}
 
-	func main() {
+		func main() {
-		list := make(List, 3)
+			list := make(List, 3)
-		list[0] = 1 // an int
+			list[0] = 1 // an int
-		list[1] = "Hello" // a string
+			list[1] = "Hello" // a string
-		list[2] = Person{"Dennis", 70}
+			list[2] = Person{"Dennis", 70}
 
-		for index, element := range list {
+			for index, element := range list {
-			if value, ok := element.(int); ok {
+				if value, ok := element.(int); ok {
-				fmt.Printf("list[%d] is an int and its value is %d\n", index, value)
+					fmt.Printf("list[%d] is an int and its value is %d\n", index, value)
-			} else if value, ok := element.(string); ok {
+				} else if value, ok := element.(string); ok {
-				fmt.Printf("list[%d] is a string and its value is %s\n", index, value)
+					fmt.Printf("list[%d] is a string and its value is %s\n", index, value)
-			} else if value, ok := element.(Person); ok {
+				} else if value, ok := element.(Person); ok {
-				fmt.Printf("list[%d] is a Person and its value is %s\n", index, value)
+					fmt.Printf("list[%d] is a Person and its value is %s\n", index, value)
-			} else {
+				} else {
-				fmt.Println("list[%d] is of a different type", index)
+					fmt.Println("list[%d] is of a different type", index)
+				}
 			}
 		}
-	}
 
 是不是很简单啊，同时你是否注意到了多个ifs里面，还记得我前面介绍流程里面讲过，if里面允许初始化变量。