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Use email address as primary key?
... if you simply retrieve a user from the database using the e-mail address. It does matter if you have complex queries with multiple joins.
If you store information about users in multiple tables, the foreign keys to the users table will be the e-mail address. That means that you store the e-mail ad...
Why is the Android emulator so slow? How can we speed up the Android emulator? [closed]
...Quick Boot option for Android Emulator. That will save emulator state, and it will start the emulator quickly on the next boot.
Click on Emulator edit button, then click Show Advanced Setting. Then enable Quick Boot like below screenshot.
Android Development Tools (ADT) 9.0.0 (or later) has a fe...
Difference between staticmethod and classmethod
What is the difference between a function decorated with @staticmethod and one decorated with @classmethod ?
27 Answers
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CSS/HTML: What is the correct way to make text italic?
What is the correct way to make text italic? I have seen the following four approaches:
12 Answers
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How does PHP 'foreach' actually work?
...e prefix this by saying that I know what foreach is, does and how to use it. This question concerns how it works under the bonnet, and I don't want any answers along the lines of "this is how you loop an array with foreach ".
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Dismissing a Presented View Controller
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I think Apple are covering their backs a little here for a potentially kludgy piece of API.
[self dismissViewControllerAnimated:NO completion:nil]
Is actually a bit of a fiddle. Although you can - legitimately - call this on the presented view controller, all i...
How to avoid annoying error “declared and not used”
I'm learning Go but I feel it is a bit annoying that when compiling, I should not leave any variable or package unused.
8 ...
What is external linkage and internal linkage?
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When you write an implementation file (.cpp, .cxx, etc) your compiler generates a translation unit. This is the source file from your implementation plus all the headers you #included in it.
Internal linkage refers to everything only ...
STL or Qt containers?
...xclusively and converting to/from the Qt equivalents, but I have already switched to QString and I find that I'm using Qt's containers more and more.
When it comes to strings, QString offers much more complete functionality compared to std::basic_string and it is
completely Unicode aware. It also o...
What are the different usecases of PNG vs. GIF vs. JPEG vs. SVG?
When should certain image file types be used when building websites or interfaces, etc?
13 Answers
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