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JavaScript JavaScript Foundations Functions Return Values

Alex Gustafson
Alex Gustafson
14,207 Points
Posted by Alex Gustafson
Alex Gustafson
14,207 Points

Code Challenge help: Creating the javascript function arrayCounter

I'm working on this challenge: "Around line 17, create a function named 'arrayCounter' that takes in a parameter which is an array. The function must return the length of an array passed in or 0 if a 'string', 'number' or 'undefined' value is passed in."

Here was my attempt:

      function arrayCounter (someArray){
        var arrayCount = 0;

        if (typeof someArray === 'string', 'number', 'undefined')
        {
          return arrayCount;
        }

        arrayCount = someArray.length;

        return arrayCount;
      }

The code challenge is telling me that when it passes an array '1,2,3' it gets the result 0 not 3. I'm not sure where my error is though? Am I using the function return incorrectly? Something wrong with the scope of the argument someArray or the variable arrayCount? Is the typeof operator not behaving as I thought?

1 Answer

Phillip Gibson
Phillip Gibson
13,805 Points

Your if block is formatted incorrectly. What you are probably looking for is the || (or) operator, which will allow you to define multiple conditionals within that same if check.

if (typeof someArray === 'string' || typeof someArray === 'number' || typeof someArray === 'undefined') {
  return arrayCount;
}
Phillip Gibson
Phillip Gibson
13,805 Points

Glad to be of assistance. :)