go-slice

//slice.go
package main

import "fmt"

func main() {
    //array
    var myArray [10]int = [10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
    //slice
    var mySlice []int = myArray[:5]

    fmt.Println("Element of myArray: ")
    for _, v := range myArray {
        fmt.Print(v, " ")
    }

    fmt.Println("\nElements of mySlice: ")

    for _, v := range mySlice {
        fmt.Print(v, " ")
    }
    fmt.Println()
}

[ `go run slice.go` | done: 338.6421ms ]
    Element of myArray: 
    1 2 3 4 5 6 7 8 9 10 
    Elements of mySlice: 
    1 2 3 4 5

---

package main

import "fmt"

func main() {
    mySlice := make([]int, 5, 10)

    //len 返回数组切片中当前存储的元素个数
    //cap 返回数组切片分配的空间大小
    fmt.Println("len(mySlice)", len(mySlice))
    fmt.Println("cap(mySlice)", cap(mySlice))
}



[ `go run slice.go` | done: 316.4858ms ]
    len(mySlice) 5
    cap(mySlice) 10