where is array defined or input? this retuns Sintax errour

Question

nowhere does array values are defined hence nothing can really happen

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.length) {
        if array.length === 'string' {
          return = 0;
        }
        if array.length === 'number' {
          return = 0;
        }
        if array.length === 'undefined' {
          return = 0;
        }
        return array.length();
      }


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

Answer 1 · 2015-01-05T12:22:04Z

January 5, 2015 12:22pm

Hi Sarah,

The parameter given to the arrayCounter function is passed through via the challenge validation, you don't need to specify this unless explicitly asked to by the challenge which isn't required in this case.

Some problems with your code are listed below.

array.length is an invalid parameter name, names should only consist of a single word
your IF statements are missing the opening and closing parentheses
syntax such as array.length === 'string' as the length property is an int, to find the type of a variable you need to use typeof
array.length() is invalid since length is a property, not a method
return = 0; is invalid as return statements only require an expression.

The code you want to end up with should be similar to the below.

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

    return array.length;
}

Happy coding!

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Sarah A. Morrigan

Sarah A. Morrigan

where is array defined or input? this retuns Sintax errour

1 Answer

Chris Shaw

Chris Shaw