closures

I have this function notes.forEach(function(note) { setTimeout(function() { playNote(note); }, 1000); }); This doesn't work. It plays all the notes at the same time, instead of playing them sequentially with a 1 second gap in between. It looks like I need to have a closure here to make this work. Could someone help me fix this function so it would play the note with the delay between each note? Cracker0dks because all timeouts are set at the same time... Do something like this: playAllNotes(0); function playAllNotes(index) { if(notes.length > index) { setTimeout(function() { playNote(notes

I want to add closure properties in the extension of UITextView so I define a closure using typealias: typealias TextViewHeightDidChangedClosure = (_ currentTextViewHeight:CGFloat)->Void extension UITextView{ func setTextViewHeightDidChanged(textViewHeightDidChanged:TextViewHeightDidChangedBlock){ objc_setAssociatedObject(self, &TextViewHeightDidChangedBlockKey, textViewHeightDidChanged, objc_AssociationPolicy.OBJC_ASSOCIATION_COPY_NONATOMIC) } func textViewHeightDidChanged()->TextViewHeightDidChangedBlock?{ let textChanged : ((CGFloat)->Void) = objc_getAssociatedObject(self,

I'm trying to learn Javascript closures. I'm having trouble getting my head around the fact that when you create several closures in a loop, all closures save only the last state of a variable. With this example var links = document.getElementsByTagName('a'); for (var x=0; x<links.length; x++) attachListener(); function attachListener() { links[x].addEventListener('click', function(){ console.log(x); }, false); }; When I have three links in my document, clicking on any link shows "3", I guess because x got incremented to 3 after the final run of the loop. I read in this excellent intro that if

With the new java lambdas and the concept of functional interfaces, will it be possible to treat those functional interfaces as methods? interface Func { void execute(int i); } void call(Func f) { f(1); //instead of f.execute(1); } I found a lot of information about the syntax of actual lambda expressions, but nothing about this. Your proposition What you propose has been discussed on the lambda-dev mailing list before: http://mail.openjdk.java.net/pipermail/lambda-dev/2012-February/004518.html It was mainly rejected because of the various problems related to ambiguity that would arise for the

Quoted from the Adobe ColdFusion 10: Using closures documentation : function helloTranslator(String helloWord) { return function(String name) { return "#helloWord#, #name#"; }; } How to scope helloWord and name properly on the return line? Are they both in Arguments scope? If that's the case, they must be unique? The Closures and functions section also mentions there are 4 more scopes on top of the already long scope search: In closure, following is the order of search for an unscoped variable: Closure's local scope Closure's arguments scope Outer function's local scope if available Owner

How do variables captured by a closure interact with different threads? In the following example code I would want to declare totalEvents as volatile, but C# does not allow this. (Yes I know this is bad code, it's just an example) private void WaitFor10Events() { volatile int totalEvents = 0; // error CS0106: _someEventGenerator.SomeEvent += (s, e) => totalEvents++; while(totalEvents < 10) Thread.Sleep(100); } EDIT : People seem to be missing the point of my question a bit. I know I can't use volatile on local vars. I also know that the example code code is bad and could be implemented in