Question

我是javascript的新手，我无法弄清楚如何将二维阵列的元素复制到另一个二维阵列中这些是我到目前为止所做的3x3阵列

// first 2 dimensional 3 X 3 array
var myArray1 = new Array(3)

for (i=0; i < 3; i++)
myArray1[i]=new Array(3)

var start = 1;

for (var i = 0; i < 3; i++)
{ for (var j = 0; j < 3; j++) { myArray1[i][j] = start; start = start + 1; }
}

for (var i = 0; i < 3; i++)  
{ for (var j = 0; j < 3; j++) { document.write(myArray1[i][j] + " ");}  
document.write("<br/>");
}

document.write("<br/>");
document.write(" +");
document.write("<br/>");
document.write("<br/>");


// second 2 dimensional 3 X 3 array
var myArray2 = new Array(3)

for (i = 0; i < 3; i++) myArray2[i] = new Array(3)

for (var i = 0; i < 3; i++)
{ for (var j = 0; j < 3; j++) { start = start - 1; myArray2[i][j] =   start; }
}

for (var i = 0; i <3; i++)
{ for (var j = 0; j < 3; j++) { document.write(myArray2[i][j] + " "); }     
document.write("<br/>");
}

document.write("<br/>");
document.write(" =");
document.write("<br/>");
document.write("<br/>");

Answer 1

我建议您使用较短的数据副本：

var myArray1 = new Array(3)
    for (i=0; i < 3; i++)
      myArray1[i]=new Array(3);
for (var start = 1, i = 0; i < 3; i++)
    for (var j = 0; j < 3; j++, start++)
      myArray1[i][j] = start;

var myArray2 = new Array(3)
for (i = 0; i < 3; i++)
    myArray2[i] = new Array(3)
for (var i = 0; i < 3; i++)
    for (var j = 0; j < 3; j++)
      myArray2[i][j] = myArray1[i][j];

console.log(myArray1); // [ [ 1, 2, 3 ], [ 4, 5, 6 ], [ 7, 8, 9 ] ]
console.log(myArray2); // [ [ 1, 2, 3 ], [ 4, 5, 6 ], [ 7, 8, 9 ] ]

将二维数组的元素复制到另一个二维数组中

1 个答案: