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How to call asynchronous method from synchronous method in C#?
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The Microsoft.AspNet.Identity base classes only have Async methods and in order to call them as Sync there are classes with extension methods that look like (example usage):
public static TUser FindById<TUser, TKey>(this UserManager<TUser, TKey> manager, TKey userId) where TUser : clas...
Proper way to implement IXmlSerializable?
... to the various functions.
WARNING: XmlDocument (and/or XDocument) is an order of magnitude slower than xmlreader/writer, so if performance is an absolute requirement, this solution is not for you!
class ExampleBaseClass : IXmlSerializable {
public XmlDocument xmlDocument { get; set; }
p...
Why should C++ programmers minimize use of 'new'?
... It can do so because it requires you to release the memory in the reverse order (First-In, Last-Out: FILO). This is the memory allocation technique for local variables in many programming languages. It is very, very fast because it requires minimal bookkeeping and the next address to allocate is ...
Static Initialization Blocks
... = 0; static{widgets = 2;} Found out that the '=' assignment happens in order, which means the '=' put first will be assigned first. The above example will give 'widgets' a value of 2. (P.S. didn't know that comments can only be edited in 5 min...)
– Weishi Zeng
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Why shouldn't Java enum literals be able to have generic type parameters?
... generic method like
public static MyEnum valueOf(String name);
in order to call it like MyEnum<String> myStringEnum = MyEnum.value("some string property"), that wouldn't work either.
For example what if you call MyEnum<Int> myIntEnum = MyEnum.<Int>value("some string proper...
Convert a String In C++ To Upper Case
...ng slow on Windows when a locale is set.
I was shocked that Boost is an order of magnitude slower than the other options. I double-checked that I had -O3 enabled, and even single-stepped the asm to see what it was doing. It's almost exactly the same speed with clang++ 3.8. It has huge overhead...
Why is it string.join(list) instead of list.join(string)?
...ng join on strins side-steps this problem at the cost of the "unintuitive" order. A better choice might have been to keep it a function with the first argument being the iterable and the second (optional one) being the joiner string - but that ship has sailed.
– user4815162342
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How to extract the year from a Python datetime object?
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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Select first 4 rows of a data.frame in R
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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How to send an object from one Android Activity to another using Intents?
...an one field to retrieve from a given Parcel, you must do this in the same order you put them in (that is, in a FIFO approach).
Once you have your objects implement Parcelable it's just a matter of putting them into your Intents with putExtra():
Intent i = new Intent();
i.putExtra("name_of_extra",...