Preparation code

<script>
  function contains(str, substr) {
   return ('' + str).indexOf(substr) !== -1;
  }
  
  
  function contains2(str, substr) {
   return !~ ('' + str).indexOf(substr);
  }

  function contains3(str, substr) {
   return ('' + str).indexOf(substr) > -1;
  }
</script>

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contains('unicorns', 'corn');

contains2('unicorns', 'corn');

contains3('unicorns', 'corn');

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 4: published on 25th January 2013

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