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Which kind of pointer do I use when?
...ded. I understand that C++11 now provides some of the types boost came up with, but not all of them.
4 Answers
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Fastest way to determine if record exists
As the title suggests... I'm trying to figure out the fastest way with the least overhead to determine if a record exists in a table or not.
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Why does my 'git branch' have no master?
I'm a git newbie and I keep reading about a "master" branch. Is "master" just a conventional name that people used or does it have special meaning like HEAD ?
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Set value for particular cell in pandas DataFrame using index
...0), is far and away faster than the options I've suggested below. However, it has been slated for deprecation.
Going forward, the recommended method is .iat/.at.
Why df.xs('C')['x']=10 does not work:
df.xs('C') by default, returns a new dataframe with a copy of the data, so
df.xs('C')['x']=10...
Is there any use for unique_ptr with array?
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Some people do not have the luxury of using std::vector, even with allocators. Some people need a dynamically sized array, so std::array is out. And some people get their arrays from other code that is known to return an array; and that code isn't going to be rewritten to return a vector...
Proper use of 'yield return'
...that continues to mystify me, and I've never been confident that I'm using it correctly.
16 Answers
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How do I clone a generic List in Java?
...his will work fine for Strings (which is what the question asked for), but it is worth noting that ArrayList.clone will perform a shallow copy, so if there were mutable objects in the list, they will not be cloned (and changing one in one list will change that one in the other list as well.
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How can I autoformat/indent C code in vim?
... to the top of the file, = is a command to fix the indentation and G tells it to perform the operation to the end of the file.
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How to get the client IP address in PHP [duplicate]
...ER['HTTP_X_FORWARDED_FOR'], but this value is easily spoofed. For example, it can be set by someone without a proxy, or the IP can be an internal IP from the LAN behind the proxy.
This means that if you are going to save the $_SERVER['HTTP_X_FORWARDED_FOR'], make sure you also save the $_SERVER['RE...
How to create an array of object literals in a loop?
I need to create an array of object literals like this:
9 Answers
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