What is the best way to convert the string values to an int array, e.g.:

var s = '1,1,2';

to:

var a = [1,1,2];

Thanks

What is the best way to convert the string values to an int array, e.g.:

var s = '1,1,2';

to:

var a = [1,1,2];

Thanks

• javascript

Share Improve this question Follow edited Feb 10, 2011 at 17:16 Andy E 345k8686 gold badges481481 silver badges451451 bronze badges asked Feb 10, 2011 at 16:56 xylarxylar 7,6731717 gold badges5959 silver badges105105 bronze badges 3

• Do you trust the values in the string array or do you need to validate that each value is numeric? – jball Commented Feb 10, 2011 at 16:58
• I was thinking about using split then parseInt to make sure, the values should be ok though – xylar Commented Feb 10, 2011 at 17:01
• If you trust the values, the solution in the first part of @Andy E's answer is the simplest and quickest. – jball Commented Feb 10, 2011 at 17:04

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3 Answers 3

Sorted by: Reset to default 5

"1,2,3".split(",").map(Number);

And for those browsers that don't implement map, take an implementation like this one from here: https://developer.mozilla/en/JavaScript/Reference/Global_Objects/Array/map

Array.prototype.map is in ECMAScript5, so don't be afraid to augment Array.prototype.

JavaScript is a dynamic-typed language, which means that it might not be so important for those array items to be numbers. If that's the case, you might want to consider just using split():

var s = '1,1,2',
    a = s.split(",");

If it is important that they're numbers, then your best bet is to iterate over them afterwards:

for (var i = 0, max = a.length; i < max; i++)
    a[i] = +a[i]; 

There's also the ECMAScript 5th Edition method map, but it's not implemented in all browsers yet.

If the data is secure, you could use .eval().

var a = eval( '[' + s + ']');

If you're not sure about security, you could use JSON.parse.

var a = JSON.parse( "[" + s + "]" );

...though you'll need to include a parser in browsers that don't support it natively.