Conversion between different types of slices in the go language

Will []TSlices are converted to []byte

Convert other types of arrays to arrays in C-like languages char :

interface{}) (data []byte) {    sv := reflect.ValueOf(slice)    if sv.Kind() != reflect.Slice {        panic(fmt.Sprintf("ByteSlice called with non-slice value of type %T", slice)) } h := (*reflect.SliceHeader)((unsafe.Pointer(&data))) h.Cap = sv.Cap() * int(sv.Type().Elem().Size()) h.Len = sv.Len() * int(sv.Type().Elem().Size()) h.Data = sv.Pointer() return}

Based on this function, we can easily invoke []byte the function of the type parameter:

func SaveImageData(name string, data []color.RGBA) error {    return ioutil.WriteFile(name, ByteSlice(data), 0666)}

Precautions

The conversion operation has a certain risk, the user needs to ensure their own security. These are mainly related to the following types:

• When a struct contains pointers, the conversion can cause garbage collection problems.
• If it is a []byte turn []T may cause the start address to be misaligned (it is []byte possible to slice from an odd position).
• The conversion operation may depend on the current system, and there are differences between different types of processors.

The benefits of this conversion operation are performance and similar void* generics, which are cgo ideal for use with interfaces.

http://my.oschina.net/chai2010/blog/266864

Conversion between different types of slices in the go language