D3 Examples - Tinkering with Javascript

xxxxxxxxxx
 
<!doctype html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Tinkering with Javascript</title>
  </head>
  <body>
    <script>
      var h = {
        name: 'Computer',
        cost: '$1,000'
      };
      var test1 = [];
      var test2 = ['name', 'cost'];
      var test3 = ['name', 'bio', 'cost'];
​
      var hasElems = function (obj, arr) {
        for (i = 0; i < arr.length; i++) {
          // commenting this to conceal the answer
        }
        return true;
      }
​
      console.log('returns true for an empty array', hasElems(h, test1));
      console.log('returns true if it has all the keys', hasElems(h, test2));
      console.log('returns false if one or more of the keys isn’t in the hash', hasElems(h, test3));
    </script>
  </body>
</html>
    