How can I convert a comma-separated string to an array?

Question

I have a comma-separated string that I want to convert into an array, so I can loop through it.

Is there anything built-in to do this?

For example, I have this

Answer 1

Shortest

str.split`,`

var str = "January,February,March,April,May,June,July,August,September,October,November,December";

let arr = str.split`,`;

console.log(arr);

Answer 2

You can try the following snippet:

 var str = "How,are,you,doing,today?";
    var res = str.split(",");
    console.log("My Result:", res)

Answer 3

The split() method is used to split a string into an array of substrings, and returns the new array.

var array = string.split(',');

Answer 4

As @oportocala mentions, an empty string will not result in the expected empty array.

So to counter, do:

str
.split(',')
.map(entry => entry.trim())
.filter(entry => entry)

For an array of expected integers, do:

str
.split(',')
.map(entry => parseInt(entry))
.filter(entry => typeof entry ==='number')

Answer 5

Return function

var array = (new Function("return [" + str+ "];")());

Its accept string and objectstrings:

var string = "0,1";

var objectstring = '{Name:"Tshirt", CatGroupName:"Clothes", Gender:"male-female"}, {Name:"Dress", CatGroupName:"Clothes", Gender:"female"}, {Name:"Belt", CatGroupName:"Leather", Gender:"child"}';

var stringArray = (new Function("return [" + string+ "];")());

var objectStringArray = (new Function("return [" + objectstring+ "];")());

JSFiddle https://jsfiddle.net/7ne9L4Lj/1/

Answer 6

I had a similar issue, but more complex as I needed to transform a CSV file into an array of arrays (each line is one array element that inside has an array of items split by comma).

The easiest solution (and more secure I bet) was to use PapaParse which has a "no-header" option that transform the CSV file into an array of arrays, plus, it automatically detected the "," as my delimiter.

Plus, it is registered in Bower, so I only had to:

bower install papa-parse --save

And then use it in my code as follows:

var arrayOfArrays = Papa.parse(csvStringWithEnters), {header:false}).data;

I really liked it.