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
        }
    }
}

Why don't you put them together? angkaPertama.concat(angkaKedua); Will give you 1 array. — Mike Bovenlander
– Mike Bovenlander, Commented Mar 30, 2016 at 11:48

Rajaprabhu Aravindasamy · Accepted Answer · 2016-03-30 11:47:09Z

6

Try to use a simple modulo math at this context,

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

DEMO

answered Mar 30, 2016 at 11:47

Rajaprabhu Aravindasamy

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1 Comment

Rajaprabhu Aravindasamy Over a year ago

@MalhadiJr Glad to help! :)

jmjuanes · Accepted Answer · 2016-03-30 11:53:16Z

0

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;
}

answered Mar 30, 2016 at 11:53

jmjuanes

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Comments

John · Accepted Answer · 2016-03-30 11:55:39Z

0

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>");
})

answered Mar 30, 2016 at 11:55

John

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Comments

Dattatreya Kugve · Accepted Answer · 2016-04-04 05:29:49Z

0

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

edited Apr 4, 2016 at 5:29

answered Mar 30, 2016 at 11:50

Dattatreya Kugve

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