get each data from multidimentional array in javascript

Question

I have data like this

var data = [[1, 2, 3, 4], [5, 6, 7, 8]];

I want to get each data from that array like 1, 2, 3, 4, 5, 6 ,7 ,8 using for looping but I can't get each data.

this is my code for get each data using looping

var each = [];
for (var i = 0; i < data.length; i++) {
            each.push(data[i]);
            for (var i = 0; i < each.length; i++) {
                console.log(each[i]);
            };
        };

in my thinking, I can get each of my array data like 1,2,3 etc

but the looping result is [1,2,3,4]. This is first data in my array

please anybody tell me the best way to get each data from that array

what do you mean with "get each data"? Is this `[1, 2, 3, 4, 5, 6 ,7 ,8]` array should be expected output? — RomanPerekhrest, Jun 03 '16 at 07:47
I want the result is `1, 2, 3, 4, 5, 6, 7, 8` in no array. it means i want to get every item from that array — Arie Sastra, Jun 03 '16 at 07:50
Possible duplicate of [What is the most efficient way to concatenate N arrays in JavaScript?](http://stackoverflow.com/questions/5080028/what-is-the-most-efficient-way-to-concatenate-n-arrays-in-javascript) — RomanPerekhrest, Jun 03 '16 at 08:00

score 1 · Answer 1 · answered Jun 03 '16 at 07:50

1

You could use Array#reduce and Array#concat to get a flat array.

var data = [[1, 2, 3, 4], [5, 6, 7, 8]],
    each = data.reduce(function (r, a) { return r.concat(a); }, []);

console.log(each);

answered Jun 03 '16 at 07:50

Nina Scholz

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score 0 · Answer 2 · answered Jun 03 '16 at 07:57

0

Do it like this:

data = [[1, 2, 3, 4], [5, 6, 7, 8]];
var joined = [].concat.apply([], data).join(",");
   console.log(joined);

answered Jun 03 '16 at 07:57

Cyril Cherian

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score 0 · Answer 3 · answered Jun 03 '16 at 08:02

0

another option will be to use a concat with apply

var data = [[1, 2, 3, 4], [5, 6, 7, 8]];   
var flat = [].concat.apply([],data);
console.log(flat);

answered Jun 03 '16 at 08:02

ismapro

162
9

score 0 · Accepted Answer · answered Jun 03 '16 at 08:09

The more appropriate way is to use Array#reduce but you can also make your code work with below changes:

var each = [];
 for (var i = 0; i < data.length; i++) { 
        each = each.concat(data[i]);           
        for (var j = 0; j < each.length; j++) {
            console.log(each[j]);
        }
 }

score 0 · Answer 5 · answered Jun 03 '16 at 08:09

0

I guess the simplest way would be

var data = [[1, 2, 3, 4], [5, 6, 7, 8]],
       z = [].concat(...data); // [1,2,3,4,5,6,7,8];

answered Jun 03 '16 at 08:09

Redu

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get each data from multidimentional array in javascript

5 Answers5