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PHP Regex to check date is in YYYY-MM-DD format
...t worked for the person who asked, read this beautiful tour: stackoverflow.com/tour .
– stramin
Feb 8 '17 at 12:56
@Gr...
MySQL: multiple tables or one table with many columns?
...e amount of work the database needs to do when reading data). I'd highly recommend making your data as normalized as possible to start out, and only denormalize if you're aware of performance problems in specific queries.
sh...
Mapping two integers to one, in a unique and deterministic way
Imagine two positive integers A and B. I want to combine these two into a single integer C.
18 Answers
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What exactly are unmanaged resources?
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Open Database connection comes under which category? Managed / Unmanaged?
– Deviprasad Das
Aug 8 '10 at 5:38
8
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Only detect click event on pseudo-element
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How do you avoid over-populating the PATH Environment Variable in Windows?
...n your system. For example I have almost everything accessible through the command line, but now I come to the limit of the path string, so i can't add any more dir.
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Delete an element from a dictionary
...ay misunderstand that dict(d) can give them a copy with 'd'. But it's an incomplete copy. When only doing del keys operations, that's OK. But when you want to do something else to a nested dict, modifying 'r' using that copy method may cause change to the original 'd'. To get an authentic copy, you ...
When should one use RxJava Observable and when simple Callback on Android?
...both are loaded, the page should be displayed.
The callback variant will become a bit more difficult: you have to create 2 callbacks, store the data in the activity, and if all the data is loaded, display the page:
Callback:
api.getUserDetails(userId, new Callback<UserDetails>() {
@Overr...
Why does Math.Round(2.5) return 2 instead of 3?
... Return ValueType: System.DoubleThe integer nearest a. If the
fractional component of a is halfway
between two integers, one of which is
even and the other odd, then the even
number is returned. Note that this
method returns a Double instead of an
integral type.
RemarksThe behavior ...
Why is the use of tuples in C++ not more common?
.... Anything non-standard has a much higher hurdle. Pieces of Boost have become popular because programmers were clamoring for them. (hash_map leaps to mind). But while tuple is handy, it's not such an overwhelming and clear win that people bother with it.
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