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What are the pros and cons of performing calculations in sql vs. in your application
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It depends on a lot of factors - but most crucially:
complexity of calculations (prefer doing complex crunching on an app-server, since that scales out; rather than a db server, which scales up)
volume of data (if you need to access/aggregate a lot of data, doing it at ...
SQL - HAVING vs. WHERE
...erage, min, max, or sum, has been produced from multiple rows. Your query calls for a second kind of condition (i.e. a condition on an aggregation) hence HAVING works correctly.
As a rule of thumb, use WHERE before GROUP BY and HAVING after GROUP BY. It is a rather primitive rule, but it is useful ...
IIS Express gives Access Denied error when debugging ASP.NET MVC
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Worked for me in VS 2013.
– kaybee99
Jan 12 '15 at 12:50
2
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C++11 std::threads vs posix threads
...gcc std::thread is perfectly fine - it has a higher abstraction level, a really good interface and plays nicely with other C++11 classes.
The C++11 std::thread class unfortunately doesn't work reliably (yet) on every platform, even if C++11 seems available. For instance in native Android std::threa...
Are there strongly-typed collections in Objective-C?
...hich means that the runtime doesn't care about the type of an object since all objects can receive messages. When you add an object to a built-in collection, they are just treated as if they were type id. But don't worry, just send messages to those objects like normal; it will work fine (unless of ...
Variable number of arguments in C++?
...u can probably do what you want to do in a safer and simpler way. Technically to use variable number of arguments in C you include stdarg.h. From that you'll get the va_list type as well as three functions that operate on it called va_start(), va_arg() and va_end().
#include<stdarg.h>
int...
Wait for a void async method
...ning task and ha async signature why would you call it without await. even VS will give you warning about it.
– batmaci
Feb 27 '19 at 16:59
9
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Spring Expression Language (SpEL) with @Value: dollar vs. hash ($ vs. #)
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Is there a format code shortcut for Visual Studio?
...s, e.g. I have set Add/remove braces for single-line control statements (really bad description because the user has no idea what happens when you activate it^^) so the formatter always changes if(foo) bar; to if(foo) { bar; }. executing Edit.FormatSelection doesn’t change that. Might be a bug, go...
How to convert image to byte array
... been non-optimal because they changed the bit depth of the pixels (24-bit vs. 32-bit) or ignored the image's resolution (dpi).
// ImageConverter object used to convert byte arrays containing JPEG or PNG file images into
// Bitmap objects. This is static and only gets instantiated once.
pri...