Going through unknown number of arrays in a variable and return the values

Question

I have some values in a variable that could contain unknown number of arrays. for example,

digitalData.product[0] = "123";
digitalData.product[1] ="456";

and so on.

How is it possible to go through this arrays and then return the values? So, the desired output would be - 123;456;. Would the below work?

function range(start, count) {
    if (arguments.length == 1) {
        count = start;
        start = 0;
    }

    var foo = [];
    for (var i = 0; i < count; i++) {
        foo.push(start + i);
    }
    return digitalData.product.foo;
}

I would very much appreciate any help.

Possible duplicate of [Easy way to turn JavaScript array into comma-separated list?](https://stackoverflow.com/questions/201724/easy-way-to-turn-javascript-array-into-comma-separated-list) — Nisarg Shah, Sep 06 '18 at 11:31
Don't think this is duplicate of the above as the range of my array is not known beforehand. — Syed Haque, Sep 06 '18 at 11:40
Can you explain more? Where are these unkown number of arrays? I only see one. — ibrahim mahrir, Sep 06 '18 at 11:43
Sorry, I mean the length of the digitalData.product array could be anywhere from 0 to let's say 10000 — Syed Haque, Sep 06 '18 at 11:47

score 0 · Answer 1 · answered Sep 06 '18 at 11:42

0

if your desired output is like this - 123;456;789;

then you just have to join array with ";".

digitalData.product.join(";");

it will give you the same output what you want.

answered Sep 06 '18 at 11:42

Arif Rathod

578
2
13

So do you mean I just replace this line - return digitalData.product.foo with return digitalData.product.join(";"); – Syed Haque Sep 06 '18 at 11:48
yes, and remove all other code. remove that "range" function. now its not needed if you are going to use above method. var output = digitalData.product.join(";"); console.log(output); you will get result in output variable' – Arif Rathod Sep 06 '18 at 11:51

score 0 · Answer 2 · answered Sep 06 '18 at 11:49

0

It should be:

digitalData = {};
digitalData ['product'] = ["123", "456"];

function range(arguments) {
    if (arguments.product.length == 1) {
        start = 0;
        count = start+1;
    } else{
        start = 0;
        count = arguments.product.length;
    }

    var foo = [];
    for (var i = 0; i < count; i++) {
        foo.push(arguments.product[start + i]);
    }
    return foo.toString();
}

console.log(range(digitalData));

answered Sep 06 '18 at 11:49

protoproto

2,081
1
13
13

I try to make same with your ideal, although the "start" variable always 0, it not need to set! – protoproto Sep 06 '18 at 11:51
1

Thanks for your contribution but the values could be anything. 123, 456 are just examples. – Syed Haque Sep 06 '18 at 11:52

ibrahim mahrir · Accepted Answer · 2018-09-06T12:11:33.560

0

Just use slice to return the subarray you want. Don't worry about count going way beyond the end of the array as slice stops at the end of the array. Once you get that subarray, just join the results using or join(";"):

function range(start, count) {
    if (arguments.length == 1) {
        count = start;
        start = 0;
    }

    return digitalData.product.slice(start, start + count).join(";");
}

Example:

var digitalData = {
  product: ["aaa", "bbb", "ccc", "ddd", "eee", "fff", "ggg"]
};

function range(start, count) {
    if (arguments.length == 1) {
        count = start;
        start = 0;
    }

    return digitalData.product.slice(start, start + count).join(";");
}

console.log(`range(1, 3):     "${range(1, 3)}"`);
console.log(`range(2):        "${range(2)}"`);
console.log(`range(4, 10000): "${range(4, 10000)}"`);
console.log(`range(1000, 10): "${range(1000, 10)}"`);

edited Sep 06 '18 at 12:11

answered Sep 06 '18 at 11:50

ibrahim mahrir

31,174
5
48
73

Thanks, I quite like this. So, is it going to give me the output as 123;456;789 and so until the array finishes? – Syed Haque Sep 06 '18 at 12:00
@SyedHaque That's why I asked you in the comment right bellow your question. Do you want the result to be an array (example: `["aaa", "bbb"]`) or a string (example: `"aaa,bbb"`)? – ibrahim mahrir Sep 06 '18 at 12:04
apologies. I want the results to be a string i.e. "123;456;789" – Syed Haque Sep 06 '18 at 12:09
@SyedHaque Updated! – ibrahim mahrir Sep 06 '18 at 12:12
Excellent! Thanks @IbrahimMahrir – Syed Haque Sep 06 '18 at 12:14

Going through unknown number of arrays in a variable and return the values

3 Answers3