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Instance variables vs. class variables in Python
...-common use case is methods. It isn't uncommon to use class attributes for read-only constants that instances need to know (though the only benefit to this is if you also want access from outside the class), but you should certainly be cautious about storing any state in them, which is seldom what y...
Why does casting int to invalid enum value NOT throw exception?
...s are often used as flags:
[Flags]
enum Permission
{
None = 0x00,
Read = 0x01,
Write = 0x02,
}
...
Permission p = Permission.Read | Permission.Write;
The value of p is the integer 3, which is not a value of the enum, but clearly is a valid value.
I personally would rather have seen ...
How does the “this” keyword work?
...
I recommend reading Mike West's article Scope in JavaScript (mirror) first. It is an excellent, friendly introduction to the concepts of this and scope chains in JavaScript.
Once you start getting used to this, the rules are actually pre...
How to prevent Browser cache for php site
..., I can highly recommend grabbing a copy of HTTP: The Definitive Guide and reading the chapter on Caching. Also the RFCs, but reading those is a distinct skill. ("Connection: close" is a hilarious foot-shot to include, disabling efficient pipelining of requests, or will do nothing, but I suspect PHP...
What are the big improvements between guava and apache equivalent libraries?
...he code is full of best practices and useful patterns to make the API more readable, discoverable, performant, secure, thread-safe...
Having read Effective Java (awesome book BTW), I see these patterns everywhere in the code:
factory methods (such as ImmutableList.copyOf())
builder pattern (Immut...
Explanation of strong and weak storage in iOS5
... understanding the difference between strong and weak storage. I have read the documentation and other SO questions, but they all sound identical to me with no further insight.
...
How to check whether a pandas DataFrame is empty?
... on the previous examples, in which the index is 0 and empty is True. When reading the length of the columns index for the first loaded dataframe df1, it returns 0 columns to prove that it is indeed empty.
In [8]: len(df1.columns)
Out[8]: 0
In [9]: len(df2.columns)
Out[9]: 2
Critically, while the ...
How can I declare and use Boolean variables in a shell script?
... [ ] or [[ ]], and also on whether or not the operands are quoted. You can read more about that in Advanced Bash Scripting Guide: 7.3 Other Comparison Operators (scroll down to the discussion of = and ==).
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What is the difference between a URI, a URL and a URN?
...t".
So that muddies the waters further, unfortunately.
If you haven't already read Roger Pate's answer, I'd advise doing so as well.
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How do CUDA blocks/warps/threads map onto CUDA cores?
...a few weeks, but I have some doubts about the allocation of blocks/warps/thread.
I am studying the architecture from a didactic point of view (university project), so reaching peak performance is not my concern.
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