js创建二维数组

let arr = [
    [1, 2],
    [3, 4],
    [5, 6],
];

let arr = [] ;
arr[0] = [1,2,3,4,5,6];
arr[1] = [10,20,30,40,50,60]

let arr= new Array(10).fill(0)
for(let i=0;i<arr.length;i++){
    arr6[i]=new Array(5).fill(1)
}

var arr = new Array();
for(var i=0;i<5;i++){        //一维长度为5
    arr[i] = new Array();
    for(var j=0;j<5;j++){    //二维长度为5
        arr[i][j] = 0;
   }
}

const arr = Array.from(Array(2), () => new Array(4).fill(1));

const arr = Array(3).fill(0).map(x => Array(3).fill(0))

let arr = new Array(10).fill(new Array(10).fill(0))

arr[0][0]=1