I have the following array (the code is written in Java) :
String[][] a = new String[3][2];
a[0][0] = "1";
a[0][1] = "2";
a[1][0] = "1";
a[1][1] = "2";
a[2][0] = "1";
a[2][1] = "2";
and what I want to do is to print 111222 and I accomplished that in Java by doing this:
for (int i=0;i < a[i].length;i++){
for(int j=0;j <a.length;j++){
System.out.print(a[j][i]);
}
}
What is the equivalent of this in JavaScript?
Here is the equivalent code in Javascript (no space its not a script version of java)
! edit missed the particulars of the loops, fixed now
var a = [];
a.push(["1", "2"]);
a.push(["1", "2"]);
a.push(["1", "2"]);
for(var i = 0; i < a[i].length; i++) {
for(var z = 0; z < a.length; z++) {
console.log(a[z][i]);
}
}
a[z][i] is printing what its printing. Thanksvar arr =[
[1,2,3],
[4,5,6],
[7,8,9]
],arrText='';
for (var i = 0; i < arr.length; i++) {
for (var j = 0; j < arr[i].length; j++) {
arrText+=arr[i][j]+' ';
}
console.log(arrText);
arrText='';
}
Output:
js is very powerfull ; just use spread operator
mat = [[1,2,3],[3,4,5]]
mat.forEach(v=>console.log(...v));// output
run the code see the output.
1 2 3
3 4 5
for (i=0; i < a.length; i++) {
for (j = 0; j < a[i].length; j++) { document.write(a[i][j]); }
}
Though it would be smarter to add all the strings together and the print them out as one (could add to an element or alert it out.)
// first array equivalent to rows
let a = new Array(3);
// inner array equivalent to columns
for(i=0; i<a.length; i++) {
a[i] = new Array(2);
}
// now assign values
a[0][0] = "1";
a[0][1] = "2";
a[1][0] = "1";
a[1][1] = "2";
a[2][0] = "1";
a[2][1] = "2";
/* console.log appends new line at end. So concatenate before printing */
let out="";
for(let i=0; i<a.length; i++) {
for(let j=0; j<a[i].length; j++) {
out = out + a[i][j];
}
}
console.log(out);
var a = [];
a[0] = [];
a[0][0] = "1";
a[0][1] = "2";
a[1] = [];
a[1][0] = "1";
a[1][1] = "2";
a[2] = [];
a[2][0] = "1";
a[2][1] = "2";
for (i = 0; i < a[i].length; i++) {
for (j = 0; j < a.length; j++) {
document.write(a[j][i]);
}
}
