javascript tutorial - [Solved-5 Solutions] create a two dimensional array in JavaScript - javascript - java script - javascript array
Problem:
How can I create a two dimensional array in JavaScript?
Solution 1:
var items = [
[1, 2],
[3, 4],
[5, 6]
];
console.log(items[0][0]); // 1
console.log(items);click below button to copy the code. By JavaScript tutorial team
Solution 2:
var x = new Array(10);
for (var i = 0; i < 10; i++) {
x[i] = new Array(20);
}
x[5][12] = 3.0;click below button to copy the code. By JavaScript tutorial team
Solution 3:
function createArray(length) {
var arr = new Array(length || 0),
i = length;
if (arguments.length > 1) {
var args = Array.prototype.slice.call(arguments, 1);
while(i--) arr[length-1 - i] = createArray.apply(this, args);
}
return arr;
}
createArray(); // [] or new Array()
createArray(2); // new Array(2)
createArray(3, 2); // [new Array(2),
// new Array(2),
// new Array(2)]click below button to copy the code. By JavaScript tutorial team
Solution 4:
The following function can be used to construct a 2-d array of fixed dimensions:
function Create2DArray(rows) {
var arr = [];
for (var i=0;i<rows;i++) {
arr[i] = [];
}
return arr;
}click below button to copy the code. By JavaScript tutorial team
- The number of columns is not really important, because it is not required to specify the size of an array before using it.
- Then we can just call:
var arr = Create2DArray(100);
arr[50][2] = 5;
arr[70][5] = 7454;
// ...click below button to copy the code. By JavaScript tutorial team
Solution 5:
var myArray = [[]];