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
This is an extension method. See here for an explanation. Extension methods allow developers to add new methods to the public contract of an existing CLR type, without having to sub-class it or recompile the original type. Extension Methods help blend the flexibility of “duck typing” support popular within dynamic languages today with the performance … Read more
Try using the not() method instead of the :not() selector. $(“.content a”).click(function() { $(“.content a”).not(this).hide(“slow”); });
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
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
// Your code var wF = { w : 560, h : (312 – 42) / (560 / this.w) + 42 }; this isn’t what you think it is Javascript has no block scope, only function scope: this inside the definition for wF does not refer to wF. (And so this.w, whatever this is, is … Read more
See, “this” keyword refers to current object due to which method is under exceution. As, you cannot call static method using instance of class. That is why, “this” can’t be used in the above example in a static method as it is trying to print current instance wich is not at all created. So, I … Read more
When you perform an DOM query through jQuery like $(‘class-name’) it actively searched the DOM for that element and returns that element with all the jQuery prototype methods attached. When you’re within the jQuery chain or event you don’t have to rerun the DOM query you can use the context $(this). Like so: $(‘.class-name’).on(‘click’, function(evt) … Read more
The this value in the global execution context, refers to the global object, e.g.: this === window; // true For Function Code, it really depends on how do you invoke the function, for example, the this value is implicitly set when: Calling a function with no base object reference: myFunc(); The this value will also … Read more
Yes, definitely use $this. A new jQuery object must be constructed each time you use $(this), while $this keeps the same object for reuse. A performance test shows that $(this) is significantly slower than $this. However, as both are performing millions of operations a second, it is unlikely either will have any real impact, but … Read more