What can a ‘const’ method change? Without explicitly casting away constness, a const member function can change: mutable data members, and any data the class has non-const access to, irrespective of whether that data’s accessible: via member variables that are pointers or references, via pointers or references passed as function arguments, via pointers or references … Read more
this isn’t a css selector. you can avoid spelling the id of this by passing it as a context: $(‘option:selected’, this).remove(); jQuery()
When you instantiate an object in C++, the code in the constructor is the last thing executed. All other initialization, including superclass initialization, superclass constructor execution, and memory allocation happens beforehand. The code in the constructor is really just to perform additional initialization once the object is constructed. So it is perfectly valid to use … Read more
What can a ‘const’ method change? Without explicitly casting away constness, a const member function can change: mutable data members, and any data the class has non-const access to, irrespective of whether that data’s accessible: via member variables that are pointers or references, via pointers or references passed as function arguments, via pointers or references … Read more
MDN states: array.forEach(callback[, thisArg]) If a thisArg parameter is provided to forEach, it will be used as the this value for each callback invocation as if callback.call(thisArg, element, index, array) was called. If thisArg is undefined or null, the this value within the function depends on whether the function is in strict mode or not … Read more
Yes, *this is always an lvalue, no matter how a member function is called, so if you want the compiler to treat it as an rvalue, you need to use std::move or equivalent. It has to be, considering this class: struct A { void gun() &; // leaves object usable void gun() &&; // makes … Read more
You really have a nice corner case there! My take on it: the first is straightforward. Just a standard call. The ‘.’ operator lets you call the function setting b as the execution context. the second is exactly the same thing: the parens are entirely optional and the interpreter is treating the expression inside it … Read more
You need to capture the this pointer: this->cv.wait(lk, [this]{return ready;});
but in typescript this.constructor.prop causes error “TS2339: Property ‘prop’ does not exist on type ‘Function’”. Typescript does not infer the type of constructor to be anything beyond Function (after all … the constructor might be a sub class). So use an assertion: class SomeClass { static prop = 123; method() { (this.constructor as typeof SomeClass).prop; … Read more
Inside of your anonymous function this is the global object. Inside of test, this is the instance of MyObject on which the method was invoked. Whenever you call a function like this: someFunction(); // called function invocation this is always the global object, or undefined in strict mode (unless someFunction was created with bind** — … Read more