如何在GO中将二维数组转换为一维数组？

Question

Here are two data structures

result []byte
chunk  [][]byte

"chunk" is initialized as follows

chunk := make([][]byte, 3)
for i := 0 ; i < 5; i++ {
      chunk[i] = data //data is a byte array
}

How can I concatenate chunks into to result[]?

Example

If chunks is "123", "456", "789", then result should be "123456789"

Answer 1

You can use the "bytes".Join function from the standard library:

result := bytes.Join(chunks, nil)

First argument is your slice of slices ([][]byte), second argument is the separator (aka glue). In your case, the separator is an empty slice of bytes (nil works as well).

In the playground: https://play.golang.org/p/8pquRk7PDo.