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Using async/await for multiple tasks
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int[] ids = new[] { 1, 2, 3, 4, 5 };
Parallel.ForEach(ids, i => DoSomething(1, i, blogClient).Wait());
Although you run the operations in parallel with the above code, this code blocks each thread that each operation run...
Programmatically retrieve memory usage on iPhone
... anytime, programmatically. Yes I'm aware about ObjectAlloc/Leaks. I'm not interested in those, only to know if it's possible to write some code and get the amount of bytes being used and report it via NSLog.
...
HashSet versus Dictionary w.r.t searching time to find if an item exists
...cause it gives you what you want: storing a set of values (as opposed to maintaining some kind of mapping). This answer indicates that there will be no negative impact on performance compared to Dictionary.
– Francois Beaussier
Apr 7 '17 at 6:38
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calculating the difference in months between two dates
...letely disregarding the date values--then you can use this:
public static int MonthDifference(this DateTime lValue, DateTime rValue)
{
return (lValue.Month - rValue.Month) + 12 * (lValue.Year - rValue.Year);
}
Note that this returns a relative difference, meaning that if rValue is greater tha...
Save classifier to disk in scikit-learn
...ier parameters is sparse (as in most text classification examples) you can convert the parameters from dense to sparse which will make a huge difference in terms of memory consumption, loading and dumping. Sparsify the model by:
clf.sparsify()
Which will automatically work for SGDClassifier but i...
Find first element by predicate
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No, filter does not scan the whole stream. It's an intermediate operation, which returns a lazy stream (actually all intermediate operations return a lazy stream). To convince you, you can simply do the following test:
List<Integer> list = Arrays.asList(1, 10, 3, 7, 5)...
How to write log base(2) in c/c++
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If you're looking for an integral result, you can just determine the highest bit set in the value and return its position.
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How to maintain a Unique List in Java?
... e1.equals(e2), and at most one null element. As implied by its name, this interface models the mathematical set abstraction.
Note: Great care must be exercised if mutable objects are used as set elements. The behavior of a set is not specified if the value of an object is changed in a manner t...
Appending a vector to a vector [duplicate]
...y be advisable. It's smart to use reserve if you are repeatedly inserting into a vector for which you know the final size, and that size is large. Otherwise, I'd let the STL grow your vector as needed.
– moodboom
Sep 10 '13 at 16:24
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What is the usefulness of `enable_shared_from_this`?
... shared_ptr<Y> f()
{
return shared_from_this();
}
}
int main()
{
shared_ptr<Y> p(new Y);
shared_ptr<Y> q = p->f();
assert(p == q);
assert(!(p < q || q < p)); // p and q must share ownership
}
The method f() returns a valid shared_ptr, eve...