Static is a keyword with many meanings, and in this particular case, it means not global (paraphrasing) It means that each .cpp file has its own copy of the variable. Thus, when you initialize in main.cpp, it is initialized ONLY in main.cpp. The other files have it still uninitialized. First thing to fix this would … Read more
Why one mustn’t declare global variables? O_o. It just looks like a propaganda. If the author knows what he wants and what side-effects will be, why not. Maybe it’s just a quick experiment. You could declare your counter as a model class-member. Then to deal with race condition you have to add a method that … Read more
The keyword global:: causes the compiler to bind names starting in the global namespace as opposed to in the current context. It’s needed in places where a bindable member exists in a given context that has the same name as a global one and the global one is desired. For example class Test { class … Read more
Because that’s the way it is, according to the C Standard. The reason for that is efficiency: static variables are initialized at compile-time, since their address is known and fixed. Initializing them to 0 does not incur a runtime cost. automatic variables can have different addresses for different calls and would have to be initialized … Read more
How they are stored is an implementation detail (depends on the compiler). For example, in the GCC compiler, on most machines, read-only variables, constants, and jump tables are placed in the text section.
I use ‘global’ in a context such as this: _cached_result = None def myComputationallyExpensiveFunction(): global _cached_result if _cached_result: return _cached_result # … figure out result _cached_result = result return result I use ‘global’ because it makes sense and is clear to the reader of the function what is happening. I also know there is this … Read more
What you expect is the synchronous (blocking) type request. var it_works = false; jQuery.ajax({ type: “POST”, url: ‘some_file.php’, success: function (data) { it_works = true; }, async: false // <- this turns it into synchronous }); // Execution is BLOCKED until request finishes. // it_works is available alert(it_works); Requests are asynchronous (non-blocking) by default which … Read more
Solution One way to do this is to create a class and use its instance, this way you can not only access the object of the class within a controller, blade, or any other class as well. AppHelper file In you app folder create a folder named Helpers and within it create a file name … Read more
Swift 3 API guidelines state that “Names of types and protocols are UpperCamelCase. Everything else is lowerCamelCase.” https://swift.org/documentation/api-design-guidelines/ Ideally your global constants will be located within an enum, extension, or struct of some sort, which would be UpperCamelCase, and all properties in that space would be lowerCamelCase. struct LoginConstants { static let maxAttempts = 10 … Read more
Python gives the programmer a large number of tools for introspecting the running environment. globals() is just one of those, and it can be very useful in a debugging session to see what objects the global scope actually contains. The rationale behind it, I’m sure, is the same as that of using locals() to see … Read more