deferred

In A Tour of Go is written: The deferred call's arguments are evaluated immediately, but the function call is not executed until the surrounding function returns. I have difficulty in understanding the first part of the quote. What is called immediately? func def(s string) func() { fmt.Println("tier up") fmt.Println(s) return func(){ fmt.Println("clean up") } } func main() { defer def("defered line")() fmt.Println("main") } //Output: //tier up //defered line //main //clean up https://play.golang.org/p/Av3mAEXxA4R What is deferred here and what is evaluated immediately? To learn how defer and

Suppose the following code: var deferred = $.Deferred(); deferred.done(function(){ // do something with events, references to dom, etc... }); deferred.fail(function(){ // do something with events, references to dom, etc... }); If I never end up calling resolve() or fail() , will this cause memory leaks, since I keep references in the callbacks? If I call one, but not the other, will the other be garbage collected? So if I call fail() , will jquery get rid of done() ? I might be thinking wrong entirely, but would like some clarification. The closest I have found thus far was this Shall I always

I have a async function, which can recurse into itself. I'm adding jQuery deferreds to an array each time the function runs, an use $.when() to check if all promises have resolved. My issue is that I can't seem to do this without an arbitary timeout, as I simply don't know when the function stops recursing and adding new promises. Here's a JSBin demonstration . And here's the real world example . Bergi Do push to promises only synchronously, so that you know when you are finished. Since your function is recursive and returns a promise, you can just use the result promises of the recursive

Ok guys, I know this topic has already been discussed multiple times, but I can't find an answer to solve my problem. So I'm trying to do a simple think : I'm creating a string, like : distance is : " + CalculateDistance(position); The wanted result is something like distance is 5kms (8min) . CalculateDistance(position) is a function calling a Google maps API called DistanceMatrix to calculate distance between two points. The API is documented here , and the given sample perfectly works. I adapted it like this : function CalculateDistance(position) { var service = new google.maps

There are cases when you have many UI updates due a massive amount of INotifyChangedProperties events. In that case you might want to signal the changes to UI only once when all the properties are set like in a batch. I found this great article that explains how to defer the refresh of the ViewCollection: http://marlongrech.wordpress.com/2008/11/22/icollectionview-explained/ However I get an exception when the View is deferred and I try to add something to the collection. I don't understand why this shouldn't be allowed. That's the whole point of it in first place. InvalidoperationException:

Is there a way to cancel a deferred callback queue in progress? I have an arbitrary amount of ajax calls. I'd like to stop further ajax requests when data of success returns specific marker: this.oDeferred=$.Deferred(); this.oChain=this.oDeferred; for(var i=0; i<this.aKey.length; i++) { (function(iKey,self) { self.oChain=self.oChain.then(function(){ return $.ajax({ url:self.aUrl[iKey], type:'post', data:{'ajax':true}, dataType:'json', success:function(data) { if(data.bCancel==true) { //stop deferred object here! } } }); }) }(this.aKey[i],this)) } this.oDeferred.done(function() { console.log(

This question already has an answer here: Pass in an array of Deferreds to $.when() 9 answers It is the first time I am using $.when and I am having difficulty with the syntax. I have code similar to simplified example below. It works (if I haven't caused an error when I simplified it). My problem is that I don't know home many elements the customerIds array would contain. var customerIds = new [1, 2, 3]; $.when( getCustomerData(customerIds[0]), getCustomerData(customerIds[1]), getCustomerData(customerIds[2]) ).then(function() { alert('success'); }).fail(function() { alert('error'); });