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Is there any overhead to declaring a variable within a loop? (C++)
...this basic thing. Once he laughed at me declaring a variable inside a loop and I was wondering what's wrong until he cited performance as the reason not to do so and I was like "WTF!?".
– Mehrdad Afshari
Jun 11 '09 at 19:35
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Android: Vertical ViewPager [closed]
...horizontal drag you will have to override ViewPager's default touch events and swap the coordinates of MotionEvents prior to handling them, e.g.:
/**
* Uses a combination of a PageTransformer and swapping X & Y coordinates
* of touch events to create the illusion of a vertically scrolling Vie...
C++ lambda with captures as a function pointer
I was playing with C++ lambdas and their implicit conversion to function pointers. My starting example was using them as callback for the ftw function. This works as expected.
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How to solve error message: “Failed to map the path '/'.”
I've searched and searched on Google, and I can't find anything that even seems applicable to my situation, let alone solves the problem. It doesn't matter which address in my website I try to navigate to (even addresses that don't exist give this error instead of a 404), I get the exact same messag...
Altering a column: null to not null
... undesirable for several reasons, so I am looking to update all nulls to 0 and then set these columns to NOT NULL . Aside from changing nulls to 0 , data must be preserved.
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Matching an empty input box using CSS
...: 1px solid red; /* Red border only if the input is empty */
}
More info and browser support: https://css-tricks.com/almanac/selectors/p/placeholder-shown/
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What does inverse_of do? What SQL does it generate?
I'm trying to get my head around inverse_of and I do not get it.
8 Answers
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Twitter Bootstrap alert message close and open again
I have a problem with alert messages. It is displayed normally, and I can close it when the user presses x (close), but when the user tries to display it again (for example, click on the button event) then it is not shown. (Moreover, if I print this alert message to console, it is equal to [] .) ...
When do you use the “this” keyword? [closed]
...ned in the same class
You can avoid the first usage by not having member and local variables with the same name in scope, for example by following common naming conventions and using properties (Pascal case) instead of fields (camel case) to avoid colliding with local variables (also camel case). ...
SQL NVARCHAR and VARCHAR Limits
...tring containing the dynamic SQL is growing over 4000 chars. Now, I understand that there is a 4000 max set for NVARCHAR(MAX) , but looking at the executed SQL in Server Profiler for the statement
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