LocalScreen.this refers to this of the enclosing class. This example should explain it: public class LocalScreen { public void method() { new Runnable() { public void run() { // Prints “An anonymous Runnable” System.out.println(this.toString()); // Prints “A LocalScreen object” System.out.println(LocalScreen.this.toString()); // Won’t compile! ‘this’ is a Runnable! onMake(this); // Compiles! Refers to enclosing object onMake(LocalScreen.this); … Read more
Explanation of the problem this changed The value of thisMDN has changed and is no longer referencing the expected element or value. Often this is because the scope has changed, and as a result so has the this reference. this is contained in an execution context The scope refers to the current Execution ContextECMA. In … Read more
There is std::enable_shared_from_this just for this purpose. You inherit from it and you can call .shared_from_this() from inside the class. Also, you are creating circular dependencies here that can lead to resource leaks. That can be resolved with the use of std::weak_ptr. So your code might look like this (assuming children rely on existence of … Read more
Container.this.select();
Try using the not() method instead of the :not() selector. $(“.content a”).click(function() { $(“.content a”).not(this).hide(“slow”); });
I’m trying to pass display.draw which is the function in which webkitRequestAnimationFram resides. webkitRequestAnimationFrame will presumably call the function you pass in, something like this: function webkitRequestAnimationFrame(callback) { // stuff… callback(); // other stuff… } At this point, you have dissociated (detached) the draw function from its invocation context. You need to bind the function … Read more
Why is the “this” inside of of the Clickers’ click method referring to the dom node rather than … itself? Because the specification for .addEventListener() is to set the this pointer to the DOM element that caught the event. That’s how it is designed to work. When passing a method as a callback where you … Read more
In C++, one can assign to *this Yes, but you can’t do this = something in C++, which I actually believe is a closer match for what you’re asking about on the Java side here. […] what rationale is there behind the decision not to make this a variable. I would say clarity / readability. … Read more
Bind the callback function also so that this inside the callback points to the context of the React Component and not the callback function getPosts = () => { $.ajax({ type: ‘get’, url: urlname, success: (data) => { this.setState( { posts: data } ) } }); } or you could use bind like getPosts = … Read more
You aren’t attaching the event handler correctly. This line: $(‘.figure’).click(toggleCarousel(this)); …is calling toggleCarousel with this immediately (that’s what the parens will do). What you really want is to pass the function object to .click(): $(‘.figure’).click(toggleCarousel); Update: As @FelixKling pointed out, you’ll also want to pass the target of the event to the downstream functions; it … Read more