JAVASCRIPT

js array two dimensional

// declaration of a two-dimensional array
// 5 is the number of rows and 4 is the number of columns.
const matrix = new Array(5).fill(0).map(() => new Array(4).fill(0));

console.log(matrix[0][0]); // 0

javascript define multidimensional array

var iMax = 20;
var jMax = 10;
var f = new Array();

for (i=0;i<iMax;i++) {
 f[i]=new Array();
 for (j=0;j<jMax;j++) {
  f[i][j]=0;
 }
}

2d array in js

a = Array(5).fill(0).map(x => Array(10).fill(0))

2d array javascript

var items =[
     
  [1,        2,       3],//this is row 0
  [4,        5,       6],//this is row 1
  [7,        8,       9] //this is row 2
//cullom 0   cullom 1   cullom2
  
]

console.log(/* variable name */ items[/*row*/ 0][/*cullom*/ 0]);

multi dimensional array javascript

//2D array
let activities = [
    ['Work', 9],
    ['Eat', 1],
    ['Commute', 2],
    ['Play Game', 1],
    ['Sleep', 7]
];

how to create two dimensional array in js

const m = 4;
const  n = 5;
let arr = new Array(m); // create an empty array of length n
for (var i = 0; i < m; i++) {
  arr[i] = new Array(n); // make each element an array
}
console.log(arr); //  Output: [ [ <5 empty items> ], [ <5 empty items> ], [ <5 empty items> ], [ <5 empty items> ] ]

multi-dimensional array js

var array = [
  ["0, 0", "1, 0", "2, 0", "3, 0", "4, 0"],
  ["0, 1", "1, 1", "2, 1", "3, 1", "4, 1"],
  ["0, 2", "1, 2", "2, 2", "3, 2", "4, 2"],
  ["0, 3", "1, 3", "2, 3", "3, 3", "4, 3"],
  ["0, 4", "1, 4", "2, 4", "3, 4", "4, 4"],
  ]; // Think of it as coordinates, array[x, y] x = 0; y = 0; is "0, 0" on 
	// this grid

console.log(array[3][3]); // returns "3, 3"
// If you use graphics (ex: p5js or JS Canvas) then this will be a 5x5 map.
// Useful for roguelikes and/or raycasters.

2d array in js

var x = new Array(10);

for (var i = 0; i < x.length; i++) {
  x[i] = new Array(3);
}

console.log(x);
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2d array in javascript

function createArray(row,column) {
let arr = [];

for(var i=0; i<row; i++){
    arr[i] = [Math.floor(Math.random() * (10))];

    for(var j=0;j<column;j++){
        arr[i][j]= [Math.floor(Math.random() * (20))];
    }
}

return arr;
}

var arrVal = createArray(4, 5);

console.log(arrVal);

JavaScript Create a Multidimensional Array

let studentsData = [['Jack', 24], ['Sara', 23], ['Peter', 24]];

two dimensional array in javascript

let activities = [
    ['Work', 9],
    ['Eat', 1],
    ['Commute', 2],
    ['Play Game', 1],
    ['Sleep', 7]
];
Code language: JavaScript (javascript)

javascript two dimensional array

var grid = [];
iMax = 3;
jMax = 2;
count = 0;

    for (let i = 0; i < iMax; i++) {
      grid[i] = [];

      for (let j = 0; j < jMax; j++) {
        grid[i][j] = count;
        count++;
      }
    }

// grid = [
//   [ 0, 1 ]
//   [ 2, 3 ]
//   [ 4, 5 ]
// ];

console.log(grid[0][2]); // 4

2d array js

 2d array

2d array JS

<script>
  
// Create one dimensional array
    var gfg = new Array(2);
  
document.write("Creating 2D array <br>");
  
// Loop to create 2D array using 1D array
for (var i = 0; i < gfg.length; i++) {
    gfg[i] = new Array(2);
}
  
var h = 0;
  
// Loop to initialize 2D array elements.
for (var i = 0; i < 2; i++) {
    for (var j = 0; j < 2; j++) {
        gfg[i][j] = h++;
    }
}
  
// Loop to display the elements of 2D array. 
for (var i = 0; i < 2; i++) {
    for (var j = 0; j < 2; j++)    {
        document.write(gfg[i][j] + " ");
    }
    document.write("<br>");
} 
</script>

2d array JS

<script>
  
// Create one dimensional array
var gfg = new Array(3);
  
// Loop to create 2D array using 1D array
document.write("Creating 2D array <br>");
for (var i = 0; i < gfg.length; i++) {
    gfg[i] = [];
}
var h = 0;
var s = "GeeksforGeeks";
  
// Loop to initialize 2D array elements.
for (var i = 0; i < 3; i++) {
    for (var j = 0; j < 3; j++) {
  
        gfg[i][j] = s[h++];
    }
}
  
// Loop to display the elements of 2D array.
for (var i = 0; i < 3; i++) {
    for (var j = 0; j < 3; j++)
  
    {
        document.write(gfg[i][j] + " ");
    }
    document.write("<br>");
}
  
</script>

2d arrays js

let items = [
  [1, 2],
  [3, 4],
  [5, 6]
];
console.log(items[0][0]); // 1
console.log(items[0][1]); // 2
console.log(items[1][0]); // 3
console.log(items[1][1]); // 4
console.log(items);
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