Why is it not allowed to get non-const reference to a temporary object, which function getx() returns? Clearly, this is prohibited by C++ Standard but I am interested in the purpose of such restriction, not a reference to the standard. struct X { X& ref() { return *this; } }; X getx() { return X();} … Read more
Here is my code. defined( ‘ABSPATH’ ) || exit; namespace JSR; class myClass{ … } This is giving below error Global code should be enclosed in global namespace declaration Any idea how to fix it? 2 Answers 2 From the PHP manual on defining namespaces: Namespaces are declared using the namespace keyword. A file containing … Read more
Is it better to use static const vars than #define preprocessor? Or maybe it depends on the context? What are advantages/disadvantages for each method? 11 Answers 11
Let’s say I have the following class X where I want to return access to an internal member: class Z { // details }; class X { std::vector<Z> vecZ; public: Z& Z(size_t index) { // massive amounts of code for validating index Z& ret = vecZ[index]; // even more code for determining that the Z … Read more
Are there any limits to what types of values can be set using const in JavaScript, and in particular, functions? Is this valid? Granted it does work, but is it considered bad practice for any reason? const doSomething = () => { … } Should all functions be defined this way in ES6? It does … Read more
How is it recommended to create constants in Kotlin? And what’s the naming convention? I’ve not found that in the documentation. companion object { //1 val MY_CONST = “something” //2 const val MY_CONST = “something” //3 val myConst = “something” } Or …? 15 Answers 15
I keep seeing this constant pop up in various graphics header files 0.0039215689 It seems to have something to do with color maybe? Here is the first hit on Google: void RDP_G_SETFOGCOLOR(void) { Gfx.FogColor.R = _SHIFTR(w1, 24, 8) * 0.0039215689f; Gfx.FogColor.G = _SHIFTR(w1, 16, 8) * 0.0039215689f; Gfx.FogColor.B = _SHIFTR(w1, 8, 8) * 0.0039215689f; Gfx.FogColor.A … Read more
I have been playing with ES6 for a while and I noticed that while variables declared with var are hoisted as expected… console.log(typeof name); // undefined var name = “John”; …variables declared with let or const seem to have some problems with hoisting: console.log(typeof name); // ReferenceError let name = “John”; and console.log(typeof name); // … Read more
What’s the difference between: char * const and const char * 19 Answers 19
I have Constants NSString, that I want to call like: [newString isEqualToString:CONSTANT_STRING]; Any wrong code here? I got this warning: sending ‘const NSString *’ to parameter of type ‘NSString *’ discards qualifiers How should these be declared? 3 Answers 3
