Javascript 2D Array Generation Doesn't Work As Intended

I am new here, and to programming as well. Anyway, to get in topic I wrote the following program with the purpose of generating a 2 dimensional array in JavaScript, and then displa

Solution 1:

You are adding the same array to array1, again and again. Instead you need to create new arrays every time.

var array1 = [];

for (var i = 0; i < 10; i++ ) {
    var array2 = [];
    for (var j = 0; j < 10; j++) {
        array2[j] = (i+1) + "-" + (j+1);
    }
    array1[i]=array2;
}

But normally, this will be done with Array.prototype.push method, like this

var array1 = [];

for (var i = 0; i < 10; i++ ) {
    var array2 = [];
    for (var j = 0; j < 10; j++) {
        array2.push((i+1) + "-" + (j+1));
    }
    array1.push(array2);
}

Solution 2:

You can create new array each time after assigned array2 to array1, something like this

array2=[];

on

for (var i = 0; i < 10; i++ ) {
    for (var j = 0; j < 10; j++) {
        array2[j] = (i+1) + "-" + (j+1);

    }
    array1[i]=array2;
    array2=[]; //created new array each time after array2 assigned
}