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“std::endl” vs “\n”
...led for.
The only difference is that std::endl flushes the output buffer, and '\n' doesn't. If you don't want the buffer flushed frequently, use '\n'. If you do (for example, if you want to get all the output, and the program is unstable), use std::endl.
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Python: List vs Dict for look up table
...f you don't need to associate values, use sets.
Memory
Both dictionaries and sets use hashing and they use much more memory than only for object storage. According to A.M. Kuchling in Beautiful Code, the implementation tries to keep the hash 2/3 full, so you might waste quite some memory.
If you...
C# vs Java generics [duplicate]
... implementation. In that the syntax looks similar, what is it that is substandard about the Java implementation, or is it a religious point of view?
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Determining Whether a Directory is Writeable
....W_OK | os.X_OK) With os.W_OK by itself you can only delete the directory (and only if that directory is empty)
– fthinker
Mar 23 '12 at 17:13
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Big-oh vs big-theta [duplicate]
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Big-O is an upper bound.
Big-Theta is a tight bound, i.e. upper and lower bound.
When people only worry about what's the worst that can happen, big-O is sufficient; i.e. it says that "it can't get much worse than this". The tighter the bound the better, of course, but a tight bound isn't...
Avoid synchronized(this) in Java?
...unts to is that this use of this is part of your class' exposed interface, and should be documented. Sometimes the ability of other code to use your lock is desired. This is true of things like Collections.synchronizedMap (see the javadoc).
All synchronized methods within the same class use the...
How did I get a value larger than 8 bits in size from an 8-bit integer?
... occurs when the value is extended to bit-width sizeof(int) . As I understand it, incrementing a char shouldn't ever be undefined behavior as long as sizeof(char) < sizeof(int) . But that doesn't explain how c is getting an impossible value. As an 8-bit integer, how can c hold values gr...
Good geometry library in python? [closed]
I am looking for a good and well developed library for geometrical manipulations and evaluations in python, like:
8 Answers...
What is dynamic programming? [closed]
...be a very long process, but what if I give you the results for n=1,000,000 and n=1,000,001? Suddenly the problem just became more manageable.
Dynamic programming is used a lot in string problems, such as the string edit problem. You solve a subset(s) of the problem and then use that information to ...
What good technology podcasts are out there?
... needle in a haystack, except that the haystack happens to be the Internet and is filled with too many of these "Hot new Gadgets" stuff :(
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