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What is the difference between a HashMap and a TreeMap? [duplicate]
I started learning Java. When would I use a HashMap over a TreeMap?
8 Answers
8
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Regular Expression to reformat a US phone number in Javascript
I'm looking to reformat (replace, not validate - there are many references for validating) a phone number for display in Javascript. Here's an example of som>me m> of the data:
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Mismatch Detected for 'Runtim>me m>Library'
...Studio Express 2012 to build all the projects inside (as instructed in readm>me m>), and everything was built successfully. Then I made a test project in som>me m> other folder and added cryptolib as a dependency. After that, I added the include path so I can easily include all the headers. When I tried to co...
How do I turn a python datetim>me m> into a string, with readable format date?
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The datetim>me m> class has a m>me m>thod strftim>me m>. The Python docs docum>me m>nts the different formats it accepts:
Python 2: strftim>me m>() Behavior
Python 3: strftim>me m>() Behavior
For this specific example, it would look som>me m>thing like:
my_datetim>me m>...
How do you load custom UITableViewCells from Xib files?
The question is simple: How do you load custom UITableViewCell from Xib files? Doing so allows you to use Interface Builder to design your cells. The answer apparently is not simple due to m>me m>mory managm>me m>nt issues. This thread m>me m>ntions the issue and suggests a solution, but is pre NDA-release and...
How far can m>me m>mory leaks go?
I've run into m>me m>mory leaks many tim>me m>s. Usually when I'm malloc -ing like there's no tomorrow, or dangling FILE * s like dirty laundry. I generally assum>me m> (read: hope desperately) that all m>me m>mory is cleaned up at least when the program terminates. Are there any situations where leaked m>me m>mory won't ...
How to get UTC tim>me m>stamp in Ruby?
How to get UTC tim>me m>stamp in Ruby?
9 Answers
9
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Regular expression to match DNS hostnam>me m> or IP Address?
...anyone have a regular expression handy that will match any legal DNS hostnam>me m> or IP address?
21 Answers
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How do I allow HTTPS for Apache on localhost?
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I've just attempted this - I needed to test som>me m> developm>me m>nt code on my localhost Apache on Windows. This was WAAAY more difficult than it should be. But here are the steps that managed to work after much hairpulling...
I found that my Apache install com>me m>s with openss...
LISTAGG in Oracle to return distinct values
...t distinct the_column
from the_table
) t
If you need more columns, som>me m>thing like this might be what you are looking for:
select col1, listagg(col2, ',') within group (order by col2)
from (
select col1,
col2,
row_number() over (partition by col1, col2 order by col1) as rn...
