Question

Firstly – my description 😉

I’ve got a XmlHttpRequests JSON response from the server. MySQL driver outputs all data as string and PHP returns it as it is, so any integer is returned as string, therefore:

Is there any fast alternative (hack) for parseInt() function in JS which can parse pure numeric string, e.g.

var foo = {'bar': '123'}; ... foo.bar = parseInt(foo.bar); // (int) 123 

Answer 1

To convert to an integer simply use the unary + operator, it should be the fastest way:

var int = +string; 

Conversions to other types can be done in a similar manner:

var string = otherType + ''; var bool = !!anything; 

More info.