Perfection kills

$H(Event.cache).inject(0, function(m, p) {
  m += $H(p.value).values().flatten().size();
  return m;
});

Comments (13)

1. 

   Radoslav Stankov said:

   #

   Nice one(bw you have one more ‘)’ in the end)
   I generally use my CD3.Behaviors witch have very simple event-delegation build in, so I didn’t have more than 10 ~ 15 event handler, on one of my heavy js project. But on the other side those 10~15 could easy become 4~5/6 with some little effort :)
   10x for sharing

2. 

   kangax (article author) said:

   #

   Thanks, Radoslav.
   I removed the extra parenthesis.

3. 

   Zeno said:

   #

   Thanks for the nice snippet!

   (It helped me debugging a situation in which I was accumulating too many events observers… caused by Low Pro’s reassignAfterAjax=true)

4. 

   Phunky said:

   #

   This wouldn’t work for me :( does it require the latest version of PrototypeJS or would version > 1.6 be fine?

   Sounds like a great little bookmarklet tho!

5. 

   kangax (article author) said:

   #

   @Phunky

   Should work with 1.6+. Which version are you having problem with?

6. 

   Ana Wilson said:

   #

   Juriy:
   I need a code ninja like you for a client of mine who is a MS MVP – he has a js project and only the best talent will do. Are you available for telecommuting consulting engagements? if you email me back I’ll send you my contact info.

7. 

   Nrajlich said:

   #

   Just so you know, this breaks in Prototype 1.6.1 RC2, due to the new way of storing the Event cache. Here’s the fixed version:

   
$H(Element.Storage).inject(0,function(m,p){
  if (p.value.get){
    m+= p.value.get("prototype_event_registry").values().flatten().size();
  }
  return m;
})


8. 

   Victor said:

   #

   the fixed version seems not work in 1.6.1

9. 

   Burton Kent said:

   #

   If you check the <a href="http://www.prototypejs.org/2007/8/15/prototype-1-6-0-release-candidate"?release notes for 1.6.0 you’ll see that they note that “References to observed elements are no longer stored in an internal cache, to prevent leaks.” This may be part of the problem.

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