How to split a string by Node Js?

Question

My array:

var str=['data1,data2 '];

I have used:

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

But one error is showed. TypeError: Object data1,data2 has no method 'split'. How can I solve this problem.

My output will be:

arr= data1,data2
// or
arr[0]=data1;
arr[1]=data2;

How can I solve this problem ?

Answer 1

You should do this :

var arr = str.toString().split(",");

"TypeError: Object data1,data2 has no method 'split'" indicates the variable is not considered as a string. Therefore, you must typecast it.

---

^{update 08.10.2015} I have noticed someone think the above answer is a "dirty workaround" and surprisingly this comment is upvoted. In fact it is the exact opposite - using str[0].split(",") as 3 (!) other suggests is the real "dirty workaround". Why? Consider what would happen in these cases :

var str = [];
var str = ['data1,data2','data3,data4'];
var str = [someVariable]; 

str[0].split(",") will fail utterly as soon str holds an empty array, for some reason not is holding a String.prototype or will give an unsatisfactory result if str holds more than one string. Using str[0].split(",") blindly trusting that str always will hold 1 string exactly and never something else is bad practice. toString() is supported by numbers, arrays, objects, booleans, dates and even functions; str[0].split() has a huge potential of raising errors and stop further execution in the scope, and by that crashing the entire application.

If you really, really want to use str[0].split() then at least do some minimal type checking :

var arr;
if (typeof str[0] == 'string') {
    arr = str[0].split(',')
} else {
    arr = [];
}