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Does ruby have real multithreading?
I know about the "cooperative" threading of ruby using green threads . How can I create real "OS-level" threads in my application in order to make use of multiple cpu cores for processing?
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Can you help me understand Moq Callback?
...en assumption and didnt read the thing I linked to as I'd normally work it out from autocompletion myself). Hope the fix addresses your point, let me know if it doesnt
– Ruben Bartelink
Aug 10 '17 at 10:05
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What is the preferred/idiomatic way to insert into a map?
...efault-constructing and assigning the mapped_type, and that I don't care about determining if a new key has effectively inserted. When using insert, constructing a value_type is probably the way to go.
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Why Func instead of Predicate?
...s are used mainly for consistency in the LINQ operators. As of .net 3.5, about using Func<T> and Action<T> the guideline states:
Do use the new LINQ types Func<> and
Expression<> instead of custom
delegates and predicates
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Why does C++ need a separate header file?
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You seem to be asking about separating definitions from declarations, although there are other uses for header files.
The answer is that C++ doesn't "need" this. If you mark everything inline (which is automatic anyway for member functions defined ...
Android: Difference between Parcelable and Serializable?
... Serializable. One of the reasons for this is that we are being explicit about the serialization process instead of using reflection to infer it. It also stands to reason that the code has been heavily optimized for this purpose.
Look at the example below (Parcelable):
// MyObjects Parcelable clas...
What is the ultimate postal code and zip regex?
... and sometimes space/dash
Not every country uses postal codes (ex. Ireland outside of Dublin), but we'll ignore that here.
The shortest postal code format is Sierra Leone with NN
The longest is American Samoa with NNNNN-NNNNNN
You should allow one space or dash.
Should not begin or end with space or...
Why are Perl 5's function prototypes bad?
...:
sub mypush(\@@) { ... }
and call it as
mypush @array, 1, 2, 3;
without needing to write the \ to take a reference to the array.
In a nutshell, prototypes let you create your own syntactic sugar. For example the Moose framework uses them to emulate a more typical OO syntax.
This is very use...
Re-raise exception with a different type and message, preserving existing information
...store anything, I left traceback as a local variable that presumably falls out of scope. Yes, it is conceivable that it doesn't, but if you raise exceptions like that in the global scope rather than within functions, you've got bigger issues. If your complaint is only that it could be executed in a ...
SET versus SELECT when assigning variables?
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Interesting discussion about performance difference. If setting multiple values via select is faster (to code and execute) then one failsafe way to avoid point 4 (your variable value failing to change if the query returns null) is to explicitly set y...