1 package main 2  3 import "fmt" 4  5 //切片的操作 6  7 func main() { 8  9     //创建slice10     var s []int  //zero value for slice is nil11 12     for i := 0; i < 10; i++ {13         s = append(s, 2 * i + 1)14     }15     fmt.Println(s)  //[1 3 5 7 9 11 13 15 17 19]16 17     s1 := []int{
   2, 4, 6, 8}18     fmt.Println(s1)  //[2 4 6 8]19     fmt.Printf("cap:%d\n", cap(s1)) //cap:420 21     s2 := make( []int, 16)22     fmt.Println(s2)  //[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]23     fmt.Printf("cap:%d\n", cap(s2))  //cap:1624 25     s3 := make( []int, 10, 32)  //32设置的是cap值26     fmt.Println(s3)   //[0 0 0 0 0 0 0 0 0 0]27     fmt.Printf("cap:%d\n", cap(s3))  //cap:3228 29     //复制slice30     copy(s2, s1)31     fmt.Println(s2,len(s2), cap(s2))  //[2 4 6 8 0 0 0 0 0 0 0 0 0 0 0 0] 16 1632 33     //删除slice中的元素34     s2 = append( s2[:3], s2[4:]...)35     fmt.Println(s2, len(s2), cap(s2))  //[2 4 6 0 0 0 0 0 0 0 0 0 0 0 0] 15 1636 37     front := s2[0]38     s2 = s2[1:]39     fmt.Println(front)  //240     fmt.Println(s2, len(s2), cap(s2))    //[4 6 0 0 0 0 0 0 0 0 0 0 0 0] 14 1541 42     tail := s2[len(s2) - 1]43     s2 = s2[: len(s2) - 1]44     fmt.Println(tail)  //045     fmt.Println(s2, len(s2), cap(s2))   //[4 6 0 0 0 0 0 0 0 0 0 0 0]  13 1546 47 }