[knuckle_cake]

Empty jQuery sets are truthy. The page gets this doubly wrong when it says an empty list is returned (instead of the 'Array-like' jQuery set.)

Check the length property of a returned jQuery set if truthiness really matters.

[aristus]

Ah! I will verify and correct. Thanks.

[nfriedly]

JavaScript is weird about truthyness / falsyness of arrays:

  if([] == false){
    // this code runs
  }

  if( [] ) {
    // this code also runs
  }

  if([] == true){
    // this code doesn't run
  }

From http://nfriedly.com/techblog/2009/06/advanced-javascript-ope...