package main
import (
"fmt"
)
func main() {
arr := [...]string{"go", "python", "java", "c++", "c"}
fmt.Println("arr value ", arr)
fmt.Println("------------------------")
slice1 := arr[1:3]
fmt.Println("slice1 now is ", slice1)
fmt.Println("len of slice1 is ", len(slice1), ",cap of sclie1 is ", cap(slice1))
fmt.Println("------------------------")
slice2 := append(slice1, "ruby", "obj-c") //如果再添加一个php，那就又是完全不同的另一番景象了。。。
fmt.Println("slice2 is ", slice2)
fmt.Println("len of slice2 is ", len(slice2), ",cap of sclie2 is ", cap(slice2))
fmt.Println("after append : slice1 is ", slice1) //底层数组虽然变了，但是slice1的len并没有变化
fmt.Println("len of slice1 is ", len(slice1), ",cap of sclie1 is ", cap(slice1))
fmt.Println("after append : arr value is ", arr)
fmt.Println("------------------------")
slice1 = slice1[:cap(slice1)] //这回才对了。。。
fmt.Println("after reslice : slice1 is ", slice1)
fmt.Println("len of slice1 is ", len(slice1), ",cap of sclie1 is ", cap(slice1))
}
输出结果：
arr value [go python java c++ c] ------------------------ slice1 now is [python java] len of slice1 is 2 ,cap of sclie1 is 4 ------------------------ slice2 is [python java ruby obj-c] len of slice2 is 4 ,cap of sclie2 is 4 after append : slice1 is [python java] len of slice1 is 2 ,cap of sclie1 is 4 after append : arr value is [go python java ruby obj-c] ------------------------ after reslice : slice1 is [python java ruby obj-c] len of slice1 is 4 ,cap of sclie1 is 4
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