This post was mentioned on Twitter by major_code: http://tinyurl.com/cwomvm
A Better Javascript Memoizer | Unscriptable.com…

array.filter(function(item, i, ary) {
  return ary.indexOf(item) == i;
});

(Corrected the variable names)

array.filter(function(item, i) {
  return array.indexOf(item) == i;
});

I understand this won’t work for complex objects and if you want them sorted, you’ll have to do that afterwards.

for(var i = 1, length = array.length, n; i < length; ++i){
    if(-1 < (n = array.indexOf(array[i - 1], i))){
        a.splice(n, 1);
        --length;
        --i;
    }
};

an optimized fast performances version could avoid the inline splice and store those index to discard (splice could cost a lot) in order to push only certain indexes (not duplicated)

This post was mentioned on Twitter by fstraps: http://3.ly/n61 Debouncing Javascript Methods | great – $(window).resize(function(){console.log(’resized’);}.debounce()); #3lyfic…

It appears that IE clobbers* the event object once the original function call goes out of scope. It should not do this since we are holding a reference to the event object! This is obviously a bug in IE.

There is a work-around: just debounce the portion of the handler that needs to be debounced and process the event in a non-debounced function.

Example:

// the debounced part - notice we don't pass the event object
var ttt = function (code) {
    alert(code);
}.debounce(200);
 
// the attached event handler extracts the keycode ad passes it to the debounced function
this.inputbox.attachEvent('onkeypress', function (e) { ttt((e || window.event).keyCode) });

I hope that helps!

– John

* It’s not really clobbered, but I am not sure how else to explain it. The object exists, but it no longer has any members and raises exceptions if accessed: “Member not found.”

test code here:

var ttt = function(e){
	if(!e && parent.window.event) { e = parent.window.event;}
        alert(e.keyCode); // error !!
 
}.debounce(200,false);
this.inputbox.attachEvent("onkeyup", ttt, false);