how do i define a function that takes an array as a param, without defining the array?

Question

what's wrong with this sample:

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(array) {
         var array = [1, 2, 3];
      if (typeof array === 'string') {
       return 0;
      }
      if (typeof array === 'number') {
        return 0;
      }
      if (typeof array === 'undefined') {
        return 0;
      }
            return arrayCounter.length;
      }

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

Answer 1 · 2014-12-25T03:02:43Z

December 25, 2014 3:02am

Hi Beth,

You don't need to define the variable array within the function as code challenges will pass in parameters unless explicitly specified that you need to do that
the variable arrayCounter doesn't exist, you simply want to get the length of the array using the parameter array

function arrayCounter(array) {
  if (typeof array === 'string') {
    return 0;
  }

  if (typeof array === 'number') {
    return 0;
  }

  if (typeof array === 'undefined') {
    return 0;
  }

  return array.length;
}

Happy coding and Merry Christmas.

Welcome to the Treehouse Community

Looking to learn something new?

beth wright

beth wright

how do i define a function that takes an array as a param, without defining the array?

1 Answer

Chris Shaw

Chris Shaw