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In jquery an event hadler's binding is the event generating DOM element (this points to the dom element). In prototype to change the binding of an event handler one can use the bindAsEventListener function; How can I access both the instance and the DOM element from a event handler? Similar to How can I bind an event handler to an instance in JQuery? function Car(){ this.km = 0; $("#sprint").click(this.drive); //setup event handler } // event handler // in it I need to access both the clicked element // and the binding object (instance of car) Car.prototype.drive = function(){ this.km += 10; /

Consider the following code: class A { public: void foo() { auto functor = [this]() { A * a = this; auto functor = [a]() // The compiler won't accept "this" instead of "a" { a->bar(); }; }; } void bar() {} }; In VC2010, using this instead of a lead to compilation errors. Among others: 1>main.cpp(20): error C3480: '`anonymous-namespace'::<lambda0>::__this': a lambda capture variable must be from an enclosing function scope 1>main.cpp(22): error C3493: 'this' cannot be implicitly captured because no default capture mode has been specified Which I don't understand. Does it mean it doesn't know if

Here is the minimal example: class A { A* const& this_ref; public: A() : this_ref(this) {} }; GCC 5.3.0 gives warning: warning: a temporary bound to 'A::this_ref' only persists until the constructor exits [-Wextra] A() : this_ref(this) {} Is this a temporary then? What the... MSVC 2015 is silent about this, and referring to class members by this_ref->member outside the constructor in my case gives expected behaviour (but might be just a case of UB, not sure). EDIT: Note this question extends one linked as possible duplicate, because it's not generic question about way to create such reference,

I noticed that in a lot of the programs I have been modifying recently they always call the parent arguments of the current object. I know that this is needed but don't have a solid understanding as to why this is a common practice. Any wisdom out there for a junior level developer... I should know this. This is the mechanism that ExtJS uses to support class inheritance in constructors. Calling this.callParent(arguments) in a constructor calls the constructor of the immediate parent class that's being extended. I don't know which version is this question about. But as far as my code goes, in