The scodec-bits project provides convenient mechanisms to specify constant data:
val x: ByteVector = hex"deadbeef"
val y: BitVector = bin"00101101010010101"This syntax is quite clear until you need to assemble a ByteVector from pieces:
val prefixed: ByteVector = hex"0102$x"Note that the referenced variable must be a ByteVector!
Placing the substitution within the string requires an expression, rather than the simple variable reference.
val wrapped: ByteVector = hex"0102${x}0304"An alternative is to explicitly concatenate the ByteVectors:
val prefixed: ByteVector = hex"0102" ++ x