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Calculate the median of a billion numbers
If you have one billion numbers and one hundred computers, what is the best way to locate the median of these numbers?
25 A...
How do I print the type of a variable in Rust?
...merely wish to find out the type of a variable and are willing to do it at compile time, you can cause an error and get the compiler to pick it up.
For example, set the variable to a type which doesn't work:
let mut my_number: () = 32.90;
// let () = x; would work too
error[E0308]: mismatched ty...
Why is creating a Thread said to be expensive?
...e platform specific, but they are not cheap on any Java platform I've ever come across.
A Google search found me an old benchmark that reports a thread creation rate of ~4000 per second on a Sun Java 1.4.1 on a 2002 vintage dual processor Xeon running 2002 vintage Linux. A more modern platform w...
What's the difference between a Future and a Promise?
...
According to this discussion, Promise has finally been called CompletableFuture for inclusion in Java 8, and its javadoc explains:
A Future that may be explicitly completed (setting its value and status), and may be used as a CompletionStage, supporting dependent functions and actio...
Why #define TRUE (1==1) in a C boolean macro instead of simply as 1?
...ch will use the actual boolean type (and resolve to true and false) if the compiler supports it. (specifically, C++)
However, it would be better to check whether C++ is in use (via the __cplusplus macro) and actually use true and false.
In a C compiler, this is equivalent to 0 and 1.
(note that re...
How can I reconcile detached HEAD with master/origin?
I'm new at the branching complexities of Git. I always work on a single branch and commit changes and then periodically push to my remote origin.
...
Can a C# class inherit attributes from its interface?
...ived class, you need to re-declare the attributes.
If you only care about ComponentModel (not direct reflection), there is a way ([AttributeProvider]) of suggesting attributes from an existing type (to avoid duplication), but it is only valid for property and indexer usage.
As an example:
using S...
Parse usable Street Address, City, State, Zip from a string [closed]
... too -- there's only 50 of them. Also, you could soundex the words to help compensate for spelling errors.
before that is the city, and it's probably on the same line as the state. You could use a zip-code database to check the city and state based on the zip, or at least use it as a BS detector.
Th...
How do I fix the Visual Studio compile error, “mismatch between processor architecture”?
... a few other DLLs, some within my project and some external. When I try to compile the C++ DLL, I get this warning:
20 Answ...
Always pass weak reference of self into block in ARC?
...XAMPLE:
__weak MyObject *weakSelf = self;
[[SomeOtherObject alloc] initWithCompletion:^{
//By the time this gets called, "weakSelf" might be nil because it's not retained!
[weakSelf doSomething];
}];
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