closures

问题 I'm trying to assess what is the fastest solution for sharing state across a single-writer, single-reader scenario, where the reader just consumes the latest value of a state variable assigned by the writer . The shared state can be of any managed type (i.e. reference or value types). Ideally the synchronization solution would work as fast as the naive non-synchronized solution as possible, since the method will be used for both single-threaded and multi-threaded scenarios potentially

问题 I found the following piece of JavaScript code (maybe here at Stack Overflow?) for implementing a timeout: var delay = (function() { var timer = 0; return function(callback, ms) { clearTimeout(timer); timer = setTimeout(callback, ms); }; })(); I'm new to JavaScript, so I'm still trying to wrap my head around closures. If I call delay(firstCallback, 200) in one place and then delay(secondCallback, 200) right after, the first timeout callback is cleared, while the second callback executes

问题 I have a shared infoWindow for all my markers. It works good if I use jquery's $().each(function(){}) , but if I change it to JavaScrips's native for or while loop, it's not working as expected. Whenever I click a marker, it will open the last populated marker's infoWindow , instead of the clicked marker's infoWindow . This works: $(stores).each(function() { var storeId = $(this).attr('storeId'); var address = $(this).attr('rawAddress'); var city = $(this).attr('city'); var state = $(this)

问题 This question is largely based on this one: Link The main difference being that I want to pass in arguments to the closure as well. Say I have something like this: func someFunctionThatTakesAClosure(completionClosure: (venues: Dictionary<String, AnyObject>, error: NSError) -> ()) { // function body goes here var error: NSError? let responseDictionary: Dictionary<String, AnyObject> = ["test" : "test2"] completionClosure(venues: responseDictionary, error: error!) } No error here. But when I

问题 I'm trying to remove an event listener for created span elements where the function called is within a closure. I've tried various methods and none seem to work. var MyClass = function () {} MyClass.prototype.addSpan = function (el) { var span = document.createElement('span'); span.innerHTML = "Text here"; el.appendChild(span); span.addEventListener('click', (function (obj) { return function () { obj.removeSpan(); } })(this), false); } MyClass.prototype.removeSpan = function () { alert(

问题 As I read through the UIKit , most of the time I see closures (as a function parameter) with missing argument labels like this: func fooClosure(fooClosure: (Bool) -> Swift.Void) In some cases I can guess what it stands for, in others I can't. Example: Take a look at one of UIActivityViewController 's closure (as a type alias): public typealias UIActivityViewControllerCompletionWithItemsHandler = (UIActivityType?, Bool, [Any]?, Error?) -> Swift.Void What does 3rd type stand for? I have to look

问题 I'm trying to store a closure as a HashMap value. If I pass the closure arg by value, everything works great: use std::collections::hash_map::HashMap; fn main() { let mut cmds: HashMap<String, Box<FnMut(String)->()>> = HashMap::new(); cmds.insert("ping".to_string(), Box::new(|&mut:s| { println!("{}", s); })); match cmds.get_mut("ping") { Some(f) => f("pong".to_string()), _ => () } } (playpen) But if I want a closure that takes a reference arg, things go south: use std::collections::hash_map:

问题 I'm trying to call a method from swift. The method is in a singleton written in objective-C the block in the header file: typedef void(^VPersonResultBlock)(Person *person, NSError *error); - (void)askForMe:(VPersonResultBlock)block; and here's the implementation of that method. - (void)askForMe:(VPersonResultBlock)block { if (_me) block(_me,nil); else { [Person getMeWithBlock:^(PFObject *person, NSError *error) { if (!error) { _me = (Person *)person; block(_me,nil); } else if (error) { block

问题 I am new to swagger, I have generated a javascript closure angular client from the swagger's online editor, it gave me a DefaultAPI.js and other JS files that match my objects definitions. I've searched in swagger docs and on the net for a way to use the generated files in an angular application but didn't find any explanation, any clue ? 来源： https://stackoverflow.com/questions/40936437/swagger-generating-javascript-closure-angular-client

问题 Today I faced a SerializationException that refered to some anonymous inner class +<>c__DisplayClass10 stating it was not serializable, when IIS tried to store the session in the ASP.NET State Service: Type 'Xyz.GeneralUnderstandingTests+ASerializableType+<>c__DisplayClass10' in Assembly 'Xyz, Version=1.2.5429.24450, Culture=neutral, PublicKeyToken=null' is not marked as serializable. I looked for lambdas in my code and found quite a few, but most of them were not new and did never have any