Javascript - How to loop between 2 arrays?

Question

maybe this is a simple question, but i really confused with this loop.

I have 2 arrays like below:

var angkaPertama = [
 '0',
 '3',
 '8',
 '6',
 '1',
 '9',
 '5',
 '12',
 '14',
 '65',
 '54',
 '23'
]
var angkaKedua = [
 '0',
 '1',
 '2',
 '3'
]

How can i make a loop so the result is like below:

0 => 0
3 => 1
8 => 2
6 => 3
1 => 0
9 => 1
5 => 2
12 => 3
14 => 0
65 => 1
54 => 2
23 => 3

I am try this code, but fail

for (var i = 0; i < angkaPertama.length; i++) {
 for (var j = 0; j < angkaKedua.length; j++) {
 console.log(angkaPertama[i] + angkaKedua[j])
 if (i == 4) {
 break
 }
 }
}

• Arun P Johny: for (var i = 0; i< 4 && i < angkaPertama.length; i++) {
• Mike Bovenlander: Why don't you put them together? angkaPertama.concat(angkaKedua); Will give you 1 array.
• Mike Bovenlander: Duplicate: stackoverflow.com/a/1584377/3378621

Answer 1

Try to use a simple modulo math at this context,

angkaPertama.forEach(function(itm,i){
 console.log(itm + " => " + angkaKedua[i % (angkaKedua.length)]);
}); 

DEMO

• Rajaprabhu Aravindasamy: @MalhadiJr Glad to help! :)

Answer 2

Try this:

var j = 0;
for(var i = 0; i < angkaPertama.length; i++)
{
 if(j >= angkaKedua.length){ j = 0; } 
 console.log(angkaPertama[i] + ' => ' + angkaKedua[j]);
 j = j + 1;
}

Answer 3

Yes it is pretty easy when u use % (modulo):

var angkaPertama = [
 '0',
 '3',
 '8',
 '6',
 '1',
 '9',
 '5',
 '12',
 '14',
 '65',
 '54',
 '23'
]
var angkaKedua = [
 '0',
 '1',
 '2',
 '3'
]
angkaPertama.forEach(function(e,i) {
 document.write(e +" => "+angkaKedua[i%angkaKedua.length]+"<br>");
})

Answer 4

var j=0
for (var i = 0; i < angkaPertama.length; i++) {
 if(j==5)
 {
 j=0
 }
 console.log(angkaPertama[i] + angkaKedua[j++])
}