在golang中打印切片的地址 | 那些遇到过的问题

icz*_*cza 6

reflect.SliceHeader

type SliceHeader struct {
        Data uintptr
        Len  int
        Cap  int
}

fmt%p

%p    address of 0th element in base 16 notation, with leading 0x

%p    base 16 notation, with leading 0x
The %b, %d, %o, %x and %X verbs also work with pointers,
formatting the value exactly as if it were an integer.

%p&slice%p&slice

要验证,还要显式打印第0个元素的地址:

fmt.Printf("address of slice %p \n", slice)
fmt.Printf("address of slice %p \n", &slice)
fmt.Println(&slice[0])

输出将是(在Go Playground上尝试):

address of slice 0x170460 
address of slice 0x17d0b8 
0x170460

&slice[0]%pslice

现在让我们修改示例以使用我们自己的后备数组:

var arr = [4]int{1, 2, 3, 4}
var slice = arr[:]

所以这样我们也可以打印支持数组的第0个元素的地址:

fmt.Printf("address of slice %p \n", slice)
fmt.Printf("address of slice %p \n", &slice)
fmt.Println(&slice[0])
fmt.Printf("Array 0th: %p", &arr[0])

输出(在Go Playground上试试):

address of slice 0x170460 
address of slice 0x183e78 
0x170460
Array 0th: 0x170460

slice%p

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