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JavaScript JavaScript Foundations Functions Return Values

Dirk Carney
Dirk Carney
6,111 Points
Posted by Dirk Carney
Dirk Carney
6,111 Points

What is the best course of action for the Challenge Task in Stage 5: Functions?

Here is the code I put together, which is clearly not the solution:

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([]) {
        if (typeof arrayCounter === 'string') {
          return 0;  
        } else if (typeof arrayCounter === 'number') {
          return 0;
        } else if (typeof arrayCounter === 'undefined') {
          return 0;
        } else {
          return arrayCounter.length; 
        } 
     }


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

2 Answers

Robert Karlsson
Robert Karlsson
8,021 Points
Robert Karlsson
Robert Karlsson
8,021 Points

It's a good solution but I would do it the other way around, check if its NOT an array. In Javascript, arrays are objects which means that you can compare it to "object".

I have made two solutions down below:

With understandable code:

 function arrayCounter(arr)
{
        if (typeof(arr) !== "object")
        {
          return 0;
        }
        else
        {
          return arr.length;
        }
}

With shorter code:

function arrayCounter(arr)
      {
        return ((typeof(arr) !== "object") ? 0 : arr.length);
      }

Hope this helps!