如何在Go中分配非恒定大小的2D数组？ [重复]

Question

This question already has an answer here:

• How to allocate a non-constant sized array in Go 1 answer

I want to allocate space for a 2 dimensional array and I want to do so in a clean way.

address [10]int
myLength := len(address)

// 1. but this not work at all
matrix := [myLength][myLength]byte

// 2. and this initializes 10 arrays with length 0
matrix := make([][]int, myLength, myLength)

I am getting an error for the first attempt:

non-constant array bound l

PS not solved by: How to allocate a non-constant sized array in Go

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Answer 1

There's no "one liner" way to do that. simply do:

matrix := make([][]int, myLength)
for i : = 0; i < myLength; i++ {
   matrix[i] = make([]int, myLength)
}