slices _ golang
Slices are a key data type in Go, giving a more powerful interface to sequences than arrays
package main import ( "fmt" ) func main() { s := make([]string, 3) fmt.Println("emp:", s) s[0] = "a" s[1] = "b" s[2] = "c" fmt.Println("set : ", s) fmt.Println("get : ", s[2]) fmt.Println("len :", len(s)) s = append(s, "d") s = append(s, "e", "f") fmt.Println("apd : ", s) c := make([]string, len(s)) copy(c, s) fmt.Println("cpy : ", c) l := s[2:5] fmt.Println("sl1 : ", l) l = s[:5] fmt.Println("sl2 :", l) l = s[2:] fmt.Println("sl3 :", l) t := []string{"g", "h", "i"} fmt.Println("dcl :", t) twoD := make([][]int, 3) for i := 0; i < 3; i++ { innerLen := i + 1 twoD[i] = make([]int, innerLen) for j := 0; j < innerLen; j++ { twoD[i][j] = i + j } } fmt.Println("2d : ", twoD) }
emp: [ ] set : [a b c] get : c len : 3 apd : [a b c d e f] cpy : [a b c d e f] sl1 : [c d e] sl2 : [a b c d e] sl3 : [c d e f] dcl : [g h i] 2d : [[0] [1 2] [2 3 4]]
总结 :
1 : 到这里要感慨一下, golang 是好, 好在语法简单
2 : slices 的声明, 奇怪啊! s := make([]string, 3) (YY python的slice呢...)
3 : slices de copy (cpoy(c, s))
4 : .....
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