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]); // 0js 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]); // 0how to read 2 dimensional array in javascript
activities.forEach((activity) => {
activity.forEach((data) => {
console.log(data);
});
});javascript array
//create an array like so:
var colors = ["red","blue","green"];
//you can loop through an array like this:
for (var i = 0; i < colors.length; i++) {
console.log(colors[i]);
}creating a 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);javascript multidimensional array
var 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);reach to each cell in 2d array javascript
// ... Matrix declaration goes here
function getCell(matrix, y, x) {
var NO_VALUE = null;
var value, hasValue;
try {
hasValue = matrix[y][x] !== undefined;
value = hasValue? matrix[y][x] : NO_VALUE;
} catch(e) {
value = NO_VALUE;
}
return value;
}
function surroundings(matrix, y, x) {
// Directions are clockwise
return {
up: getCell(matrix, y-1, x),
upRight: getCell(matrix, y-1, x+1),
right: getCell(matrix, y, x+1),
downRight: getCell(matrix, y+1, x+1),
down: getCell(matrix, y+1, x),
downLeft: getCell(matrix, y+1, x-1),
left: getCell(matrix, y, x-1),
upLeft: getCell(matrix, y-1, x-1)
}
}Copyright © 2021 Codeinu
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