Golang Slice Data[:6:8] understanding of two colons

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General Slice, Data[6:8], from 6th to 8th (return 6, 7), Len 2, Maximum expandable length cap 4 (6-9)

package mainimport "fmt"func main() {data := [...]int{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}v := data[6:8]fmt.Println(v)fmt.Println(len(v))fmt.Println(cap(v))}

Output:

[6 7]24

Another way: Data[:6:8] There is a colon in front of each number, the slice content is data from 0 to 6th bits, the length Len is 6, the maximum expansion cap is set to 8

package mainimport "fmt"func main() {data := [...]int{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}v := data[:6:8]fmt.Println(v)fmt.Println(len(v))fmt.Println(cap(v))}

Output:

[0 1 2 3 4 5]68