var a byte
var b []byte
i know how to do this
c := append(b,a...)
but how do i do this elegantly?
c := append(a,b...) <-- what's the solution does anyone knows?
Would like to have the c[0] == a, c[1:] == b for checking next time
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1You cannot append to arrays in Go. Arrays are fixed-length. But you don't have an array, you have a slice.Jonathan Hall– Jonathan Hall2020-06-13 07:42:49 +00:00Commented Jun 13, 2020 at 7:42
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1Beyond that, what you have is already pretty elegant. What are you hoping to improve?Jonathan Hall– Jonathan Hall2020-06-13 07:52:17 +00:00Commented Jun 13, 2020 at 7:52
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2 Answers
You can make a a slice as well then append it with b.
c := append([]byte{a}, b...)
Comments
You can use the bytes.Buffer to make this cleaner:
var a byte
var buf bytes.Buffer
buf.WriteByte(a)// For a single byte
buf.Write([]byte{a})// For byte slice
2 Comments
Alpha1
Why bytes.buffer? is it slower or faster?
Ashwin Shirva
It is a handy wrapper around byte slice, and also it implements several interfaces, io.Reader, io.Writer to name a few. It is an ideal choice when you have a lot of values to append, and also it provides methods for efficient conversion of byte slice to string.