Convert string with commas to array

Question

How can I convert a string to a JavaScript array?

Look at the code:

var string = "0,1";
var array = [string];
alert(array[0]);

In this case alert shows 0,1. If it where an array, it would show 0. And if alert(array[1]) is called, it should pop-up 1

Is there any chance to convert such string into a JavaScript array?

Answer 1

For simple array members like that, you can use JSON.parse.

var array = JSON.parse("[" + string + "]");

---

This gives you an Array of numbers.

[0, 1]

If you use .split(), you'll end up with an Array of strings.

["0", "1"]

---

Just be aware that JSON.parse will limit you to the supported data types. If you need values like undefined or functions, you'd need to use eval(), or a JavaScript parser.

---

If you want to use .split(), but you also want an Array of Numbers, you could use Array.prototype.map, though you'd need to shim it for IE8 and lower or just write a traditional loop.

var array = string.split(",").map(Number);

Answer 2

Split it on the , character;

var string = "0,1";
var array = string.split(",");
alert(array[0]);

Answer 3

This is easily achieved in ES6;

You can convert strings to Arrays with Array.from('string');

Array.from("01")

will console.log

['0', '1']

Which is exactly what you're looking for.

Answer 4

If the string is already in list format, you can use the JSON.parse:

var a = "['a', 'b', 'c']";
a = a.replace(/'/g, '"');
a = JSON.parse(a);

Answer 5

Convert all type of strings

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



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/

Result in console

Some practice doesnt support object strings

- JSON.parse("[" + string + "]"); // throw error

 - string.split(",") 
// unexpected result 
   ["{Name:"Tshirt"", " CatGroupName:"Clothes"", " Gender:"male-female"}", "      {Name:"Dress"", " CatGroupName:"Clothes"", " Gender:"female"}", " {Name:"Belt"",    " CatGroupName:"Leather"", " Gender:"child"}"]

Answer 6

For simple array members like that, you can use JSON.parse.

var listValues = "[{\"ComplianceTaskID\":75305,\"RequirementTypeID\":4,\"MissedRequirement\":\"Initial Photo Upload NRP\",\"TimeOverdueInMinutes\":null}]";

var array = JSON.parse("[" + listValues + "]");

This gives you an Array of numbers.

now you variable value is like array.length=1

Value output

array[0].ComplianceTaskID
array[0].RequirementTypeID
array[0].MissedRequirement
array[0].TimeOverdueInMinutes

Answer 7

You can use split

Reference: http://www.w3schools.com/jsref/jsref_split.asp

"0,1".split(',')

Answer 8

Another option using the ES6 is using Spread syntax.

var convertedArray = [..."01234"];

var stringToConvert = "012";
var convertedArray  = [...stringToConvert];
console.log(convertedArray);

Answer 9

use the built-in map function with an anonymous function, like so:

string.split(',').map(function(n) {return Number(n);});

[edit] here's how you would use it

var string = "0,1";
var array = string.split(',').map(function(n) {
    return Number(n);
});
alert( array[0] );

Answer 10

I remove the characters '[',']' and do an split with ','

let array = stringObject.replace('[','').replace(']','').split(",").map(String);

Answer 11

You can use javascript Spread Syntax to convert string to an array. In the solution below, I remove the comma then convert the string to an array.

var string = "0,1"
var array = [...string.replace(',', '')]
console.log(array[0])

Answer 12

More "Try it Yourself" examples below.

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

Tip: If an empty string ("") is used as the separator, the string is split between each character.

Note: The split() method does not change the original string.

var res = str.split(",");

Answer 13

Regexp

As more powerful alternative to split, you can use match

"0,1".match(/\d+/g)

let a = "0,1".match(/\d+/g)

console.log(a);

Answer 14

var i = "[{a:1,b:2}]",
    j = i.replace(/([a-zA-Z0-9]+?):/g, '"$1":').replace(/'/g,'"'),
    k = JSON.parse(j);

console.log(k)

// => declaring regular expression

[a-zA-Z0-9] => match all a-z, A-Z, 0-9

(): => group all matched elements

$1 => replacement string refers to the first match group in the regex.

g => global flag

Answer 15

Split (",") can convert Strings with commas into a String array, here is my code snippet.

    var input ='Hybrid App, Phone-Gap, Apache Cordova, HTML5, JavaScript, BootStrap, JQuery, CSS3, Android Wear API'
    var output = input.split(",");
    console.log(output);

["Hybrid App", " Phone-Gap", " Apache Cordova", " HTML5", " JavaScript", " BootStrap", " JQuery", " CSS3", " Android Wear API"]

Answer 16

Why don't you do replace , comma and split('') the string like this which will result into ['0', '1'], furthermore, you could wrap the result into parseInt() to transform element into integer type.

it('convert string to array', function () {
  expect('0,1'.replace(',', '').split('')).toEqual(['0','1'])
});

Answer 17

Example using Array.filter:

var str = 'a,b,hi,ma,n,yu';

var strArr = Array.prototype.filter.call(str, eachChar => eachChar !== ',');