String manipulation with Javascript (NodeJS)

Question

String manipulation with Javascript (NodeJS)

I'm trying to remove the first 13 characters of a string with this code:

requestToken = requestToken.substring(13);

However, I'm getting "has no method substring" error with NodeJS, the code above that mostly recommended in the Javascript forums does not work with NodeJS?

javascript
node.js

Answer 1

it seems like requestToken may not be a string.

Try

requestToken = '' + requestToken;

and then requestToken.substring(13);

Answer 2

substring (and substr) are definitely functions on the string prototype in node; it sounds like you're not dealing with a string

$ node
> "asdf".substring(0,2)
'as'

Answer 3

Convert requestToken to a string first:

requestToken = (requestToken+"").slice(13);

Answer 4

requestToken must not be a string then. It's likely some sort of object, and the string you want is likely returned by a method on, or a property of, that object. Try console.log(requestToken) and see what that really is.

You also want .slice() for removing the front of a string.

And you will likely end up with something like:

myString = requestToken.someProperty.slice(13);

Answer 5

Coercing it to a string may not solve your problem. console.log(typeof(requestToken)) might give you a clue to what's wrong.

Answer 6

Try to check your object/variable:

console.log( JSON.stringify(yourObject) );

or it's type by

console.log( typeof yourVariable );