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Real life example, when to use OUTER / CROSS APPLY in SQL
... / OUTER APPLY with a colleague and we're struggling to find real life examples of where to use them.
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PHP DateTime::modify adding and subtracting months
I've been working a lot with the DateTime class and recently ran into what I thought was a bug when adding months. After a bit of research, it appears that it wasn't a bug, but instead working as intended. According to the documentation found here :
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Set every cell in matrix to 0 if that row or column contains a 0
Given a NxN matrix with 0s and 1s. Set every row that contains a 0 to all 0 s and set every column that contains a 0 to all 0 s.
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Select rows of a matrix that meet a condition
In R with a matrix:
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Move entire line up and down in Vim
In Notepad++, I can use Ctrl + Shift + Up / Down to move the current line up and down. Is there a similar command to this in Vim? I have looked through endless guides, but have found nothing.
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Is there a way to instantiate objects from a string holding their class name?
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Nope, there is none, unless you do the mapping yourself. C++ has no mechanism to create objects whose types are determined at runtime. You can use a map to do that mapping yourself, though:
template<typename T> Base * createInstance() { return new T; }
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What encoding/code page is cmd.exe using?
When I open cmd.exe in Windows, what encoding is it using?
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Adding one day to a date
My code to add one day to a date returns a date before day adding:
2009-09-30 20:24:00 date after adding one day SHOULD be rolled over to the next month: 1970-01-01 17:33:29
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Javascript: negative lookbehind equivalent?
...t of a negative lookbehind in javascript regular expressions? I need to match a string that does not start with a specific set of characters.
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How to calculate time elapsed in bash script?
I print the start and end time using date +"%T" , which results in something like:
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