WPF – Global Style?

Well, sort of – it’s a catch-all approach you can do – put the following element in your App.xaml – all your buttons will change (except the ones you apply a style to, manually). <Style TargetType=”{x:Type Button}”> <Setter Property=”Background” Value=”LightPink”/> <!– You should notice that one… –> </Style> However, if you want to hit only … Read more

Ruby on Rails: Where to define global constants?

If your model is really “responsible” for the constants you should stick them there. You can create class methods to access them without creating a new object instance: class Card < ActiveRecord::Base def self.colours [‘white’, ‘blue’] end end # accessible like this Card.colours Alternatively, you can create class variables and an accessor. This is however … Read more

C++: When (and how) are C++ Global Static Constructors Called?

When talking about non-local static objects there are not many guarantees. As you already know (and it’s also been mentioned here), it should not write code that depends on that. The static initialization order fiasco… Static objects goes through a two-phase initialization: static initialization and dynamic initialization. The former happens first and performs zero-initialization or … Read more

In Python, why is list[] automatically global? [duplicate]

It isn’t automatically global. However, there’s a difference between rep_i=1 and rep_lst[0]=1 – the former rebinds the name rep_i, so global is needed to prevent creation of a local slot of the same name. In the latter case, you’re just modifying an existing, global object, which is found by regular name lookup (changing a list … Read more

Do you use the “global” statement in Python? [closed]

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

Preserving global state in a flask application [duplicate]

Based on your question, I think you’re confused about the definition of “global”. In a stock Flask setup, you have a Flask server with multiple threads and potentially multiple processes handling requests. Suppose you had a stock global variable like “itemlist = []”, and you wanted to keep adding to it in every request – … Read more

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