How to initialize and set a 2D array in golang

Question

I am trying to simplay make a 2D array as a field on an object. I want a function that creates the object and returns it. But when trying to create the 2d array it returns a single array.

type Struct struct {
    X int
    Y int
    Grid [][]bool
}

func NewLifeSimulator(sizeX, sizeY int) *Struct{
    s := &Struct{
        X:    sizeX,
        Y:    sizeY,
        Grid: make([][]bool, sizeX,sizeY),  //Creates a regular array instead of 2D
    }
    return s
}

What do I need to change so that my function initializes a 2D array?

Answer 1

表达方式：

make([][]bool, sizeX)

将创建一个[]bool大小为 s 的切片sizeX。然后你必须遍历每个元素并将它们初始化为sizeY. 如果你想要一个完全初始化的数组：

s := &Struct{
        X:    sizeX,
        Y:    sizeY,
        Grid: make([][]bool, sizeX),
    }

// At this point, s.Grid[i] has sizeX elements, all nil

for i:=range s.Grid {
   s.Grid[i]=make([]bool, sizeY)
}

该表达式make([][]bool, sizeX, sizeY)创建一个[][]bool具有初始大小sizeX和容量的切片sizeY。