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“Instantiating” a List in Java? [duplicate]
...ayList<T>();
This is in contrast with .NET, where, since version 2.0, List<T> is the default implementation of the IList<T> interface.
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What's the most efficient way to erase duplicates and sort a vector?
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601
I agree with R. Pate and Todd Gardner; a std::set might be a good idea here. Even if you're st...
NumPy: function for simultaneous max() and min()
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50
Is there a function in the numpy API that finds both max and min with only a single pass thro...
Why is processing a sorted array faster than processing an unsorted array?
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32290
+1700
You are...
How to vertically align an image inside a div
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+550
The only (and the best cross-browser) way as I know is to use an inline-block helper with height: 100% and vertical-align: middle on b...
Why are Python lambdas useful? [closed]
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1016
Are you talking about lambda functions? Like
lambda x: x**2 + 2*x - 5
Those things are actu...
How to convert nanoseconds to seconds using the TimeUnit enum?
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201
Well, you could just divide by 1,000,000,000:
long elapsedTime = end - start;
double seconds =...
@class vs. #import
...ter to it (really, just a pointer). Thus, in your header, @class suffices 90% of the time.
However, if you ever need to create or access myObject's members, you'll need to let the compiler know what those methods are. At this point (presumably in your implementation file), you'll need to #import "M...
Is there a Python function to determine which quarter of the year a date is in?
... an instance x of datetime.date, (x.month-1)//3 will give you the quarter (0 for first quarter, 1 for second quarter, etc -- add 1 if you need to count from 1 instead;-).
Originally two answers, multiply upvoted and even originally accepted (both currently deleted), were buggy -- not doing the -1...
How to get current CPU and RAM usage in Python?
...culate percentage of available memory
psutil.virtual_memory().available * 100 / psutil.virtual_memory().total
20.8
Here's other documentation that provides more concepts and interest concepts:
https://psutil.readthedocs.io/en/latest/
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