I use the following simple code to parse some arguments; note that one of them is required. Unfortunately, when the user runs the script without providing the argument, the displayed usage/help text does not indicate that there is a non-optional argument, which I find very confusing. How can I get p...

...cally the difference between them are performance characteristics and blocking behavior. Taking the easiest first, ArrayBlockingQueue is a queue of a fixed size. So if you set the size at 10, and attempt to insert an 11th element, the insert statement will block until another thread removes an elem...

... Since you are calling the decorator like a function, it needs to return another function which is the actual decorator: def my_decorator(param): def actual_decorator(func): print("Decorating function {}, with para...

... It's a bit silly really. Every library that comes with GHC is provided in no less than 4 flavours: static dynamic profiled GHCi The GHCi version is just the static version linked together in a single .o file. The other three versions all have their own set of interface files (.hi files) too...

JSHint complains when my JavaScript calls a function that is defined further down the page than the call to it. However, my page is for a game, and no functions are called until the whole thing has downloaded. So why does the order functions appear in my code matter? ...

... Preface: This answer was written before opt-in built-in traits—specifically the Copy aspects—were implemented. I've used block quotes to indicate the sections that only applied to the old scheme (the one that applied when the question was asked). Old: To answ...

I have a simple view (left side of the picture) and i need to create some kind of overlay (right side of the picture) to this view. This overlay should have some opacity, so the view bellow it is still partly visible. Most importantly this overlay should have a circular hole in the middle of it so i...

...e first discuss the similarities. Dart's optional parameters are optional in that the caller isn't required to specify a value for the parameter when calling the function. Optional parameters can only be declared after any required parameters. Optional parameters can have a default value, which i...

I'm trying to wrap my head around which data structures are the most efficient and when / where to use which ones. 6 Answer...

... Simply specify the version in your current pom. The version specified here will override other. Forcing a version A version will always be honoured if it is declared in the current POM with a particular version - however, it should be noted that ...