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?
To convert a comma separated string to a numeric array:Call the split() method on the string to get an array containing the substrings. Use the map() method to iterate over the array and convert each string to a number. The map method will return a new array containing only numbers.
Given a long string separated with comma delimiter. The task is to split the given string with comma delimiter and store the result in an array. Use explode() or preg_split() function to split the string in php with given delimiter.
The simplest way to convert an array to comma separated String is to create a StringBuilder, iterate through the array, and add each element of the array into StringBuilder after appending the comma.
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);
Split it on the ,
character;
var string = "0,1";
var array = string.split(",");
alert(array[0]);
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.
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);
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/
- 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"}"]
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
You can use split
Reference: http://www.w3schools.com/jsref/jsref_split.asp
"0,1".split(',')
Another option using the ES6 is using Spread syntax.
var convertedArray = [..."01234"];
var stringToConvert = "012";
var convertedArray = [...stringToConvert];
console.log(convertedArray);
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] );
How to Convert Comma Separated String into an Array in JavaScript?
var string = 'hello, world, test, test2, rummy, words';
var arr = string.split(', '); // split string on comma space
console.log( arr );
//Output
["hello", "world", "test", "test2", "rummy", "words"]
For More Examples of convert string to array in javascript using the below ways:
Split() – No Separator:
Split() – Empty String Separator:
Split() – Separator at Beginning/End:
Regular Expression Separator:
Capturing Parentheses:
Split() with Limit Argument
check out this link ==> https://www.tutsmake.com/javascript-convert-string-to-array-javascript/
I remove the characters '[',']' and do an split with ','
let array = stringObject.replace('[','').replace(']','').split(",").map(String);
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(",");
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])
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);
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"]
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
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