Looking for a function?

Question

The exercise requires that a function, arrayCounter, evaluate an input and return the length of the array - or return 0 if it's not an array.

I've created the arrayCounter function and passed all the non-array test cases.

When the array [1,2,3] is inputted, my function returns what should be the correct answer: 3

However I get a failed result: "Bummer! '3' is not a function!"

Why is the grader looking for a function as the returned result?

Am I missing something or is it broke?

index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <title>JavaScript Foundations: Functions</title>
    <style>
      html {
        background: #FAFAFA;
        font-family: sans-serif;
      }
    </style>
  </head>
  <body>
    <h1>JavaScript Foundations</h1>
    <h2>Functions: Return Values</h2>
    <script>

      function arrayCounter (arr) {
        if (arr === undefined) {
          return 0;
        }
        if (typeof arr === 'string') {
          return 0;
        }
        if (typeof arr === 'number') {
          return 0;
        }
        return arr.length();
      }

    </script>
  </body>
</html>

Answer 1 · 2015-02-26T03:20:08Z

February 26, 2015 3:20am

Dave;

I think you should be using if... else if statements, or you could do something like:

function arrayCounter (x){
  if (typeof x === 'undefined' || typeof x === 'string' || typeof x === 'number') {
    return 0;
  } else
    return x.length;
 }

Happy coding,

Ken

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Dave Figueroa

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Looking for a function?

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Ken Alger

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Dave Figueroa

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