Convert type []byte to [32]byte?

Question

go

The input is a variable in the []byte type, then this variable is used as a key in the dictionary|slice
map[[32]byte]string with a fixed length of 32 bytes.
If it doesn't make it difficult, please provide several options for converting.

Answer 1

https://stackoverflow.com/questions/30285680/how-t...
copy(dst_array[:], src_slice)

Answer 2

Can be converted using "black magic" unsafe , but be careful

func b2arr32(b []byte) [32]byte {
  return *(*[32]byte)(unsafe.Pointer(&b))
}