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What reason is there to use null instead of undefined in JavaScript?
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This should have been the selected answer
– alaboudi
Mar 1 at 6:19
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How does the const constructor actually work?
...ting-widgets-b7ac56dbbeb1 "Use const to build your widgets Without const, selective rebuilding of the sub-tree does not happen. Flutter creates a new instance of each widget in the sub-tree and calls build() wasting precious cycles especially if your build methods are heavy."
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Good ways to sort a queryset? - Django
...uld expect. Case in point, first is a list of presidents sorted by score (selecting top 5 for easier reading):
>>> auths = Author.objects.order_by('-score')[:5]
>>> for x in auths: print x
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James Monroe (487)
Ulysses Simpson (474)
Harry Truman (471)
Benjamin Harrison (467)
Ge...
Is Java really slow?
... to a self-fulfilling prophecy -- when people care about speed, they often select C++ because it has that reputation. They put extra time and effort into optimization, and a new generation of fast C++ code is written.
To summarize, the normal implementation of Java makes maximum optimization proble...
What are the benefits of dependency injection containers?
...ause the really cool aspects of DI require the ability to programmatically select objects and configure and inject them into other objects using a system external and independent to the objects themselves.
A language must provide good support for both normal Object Oriented programming techniques a...
What is ViewModel in MVC?
...it is a good practice to use ViewModels. Say, you want to leave a checkbox selected based on a DB field (or two) but the DB field itself isn't a boolean. While it is possible to create these properties in the Model itself and keep it hidden from the binding to data, you may not want to clutter the M...
What's the best way to get the last element of an array without deleting it?
...as mainly produced with a lot of stubbornness and patience but the general selection and multi-line edit functions of Sublime text editor helped. regenerating it took almost a day, so if I need to do it again I will probably write something that converts the output of all 210 docker executions to a ...
Why can't I initialize non-const static member or static array in class?
...e symbol if it is used in the translation unit and ensures the linker only selects and leaves one copy if it's defined in multiple translation units due to it being in a comdat group. const at file scope makes the compiler never emit a symbol because it's always substituted immediately in the code u...
Can I get a list of files marked --assume-unchanged?
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PowerShell solution, using Select-String \ sls
git ls-files -v | sls -pattern ^h -casesensitive
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String formatting in Python 3
...ith decimal integer format.
There are many others things you can do when selecting an argument (using named arguments instead of positional ones, accessing fields, etc) and many format options as well (padding the number, using thousands separators, showing sign or not, etc). Some other examples:
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