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JavaScript JavaScript Foundations Arrays Methods: Part 2

Cynthia DiFabion
Cynthia DiFabion
3,801 Points

Don't know how to use the length property on a string in a function

I'm at a loss... searched my notes, internet and can't figure this one out... Sorting array by length of strings. I can sort but don't know how to incorporate a length of strings into function.

index.html
<!DOCTYPE html>
<html lang="en">
  <head>
    <title> JavaScript Foundations: Arrays</title>
    <style>
      html {
        background: #FAFAFA;
        font-family: sans-serif;
      }
    </style>
  </head>
  <body>
    <h1>JavaScript Foundations</h1>
    <h2>Arrays: Methods Part 1</h2>
    <script>
      var saying1 = ["The", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"];
      var saying2 = ["The", "quick", "brown", "fox", "jumped", "over", "the", "lazy", "dog's", "back"];
      saying1.reverse();
      saying2.sort(function (str.length, a, b){
        return a - b
      });
    </script>
  </body>
</html>

1 Answer

Ian Hattendorf
Ian Hattendorf
7,715 Points

The sort method takes a function with two parameters which are the two items being compared. Returning a negative value means the first item passed is less than the second, equal means they are the same and positive means the first item is larger. This works perfectly for string length comparison, so your code should look like:

saying2.sort(function (a, b){
        return a.length - b.length;
      });