No, data members cannot be captured by value. A lambda can capture only two kinds of things: the this pointer, and nonstatic local variables (that is, variables with automatic storage duration). As has been noted by ildjarn in the comments, you can create a local variable with a copy of the value of the data … Read more
async functions are effectively desugared as returning impl Future. Once you know that, it’s a matter of combining existing Rust techniques to accept a function / closure, resulting in a function with two generic types: use std::future::Future; async fn example<F, Fut>(f: F) where F: FnOnce(i32, i32) -> Fut, Fut: Future<Output = bool>, { f(1, 2).await; … Read more
Yes, it is possible to move only one or some variables into a closure (rather than all or none). Yes, this can be used to “circumvent” reference counting. I found an answer in the documentation of rayon::scope that turns out to be exactly about this problem: ‘Accessing the stack data [from within a scoped threads … Read more
Each time f1() is called that creates a new closure with its own local n variable. However, the nAdd variable is global, and so gets overwritten every time f1() is called – which means calling nAdd() will only ever add to the n variable in the last closure. UPDATE: If you want to be able … Read more
Your first example had two different int count variable declarations (from the separate method calls). Your second example is sharing the same variable declaration. Your first example would behave the same as the second example had int count been a field of your main program: static int count = 0; static Action GetWorker(int k) { … Read more
var list = [1, 2, 3, 4, 5]; for (var i = 0, len = list.length; i < len; i += 1) { (function(i) { setInterval(function() { list[i] += 10; console.log(i + “=>” + list[i] + “\n”); }, 5000) })(i); } Here is the working code: var list = [1, 2, 3, 4, 5]; for … Read more
You can use @namespace with @name and @lends like this: /** * @name MyNamespace * @namespace Hold all functionality */ (function () { “use strict”; /** @lends MyNamespace*/ var stlib = function (param, param, param) { …All of my code…}; }());