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How can I handle time zones in my webapp?
... storing timestamps is simple: Store them in UTC.
As for displaying them, it would make sense to take the device's timezone setting and use that as the current timezone. That said, there should be a timezone dropdown next to the "time input" box, which defaults to the device's current timezone, so ...
How can i query for null values in entity framework?
...thing.Equals(value)
select entry;
Workaround for Linq-to-Entities (ouch!):
var result = from entry in table
where (value == null ? entry.something == null : entry.something == value)
select entry;
This is a nasty bug which has bitten me several times. If ...
How to identify platform/compiler from preprocessor macros?
I'm writing a cross-platform code, which should compile at linux, windows, Mac OS. On windows, I must support visual studio and mingw.
...
Why prefer two's complement over sign-and-magnitude for signed numbers?
...n order to represent -1 in binary, two's complement is used: flipping the bits and adding 1?
18 Answers
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What do I use for a max-heap implementation in Python?
...
It's also the standard solution.
– Andrew McGregor
Mar 23 '10 at 16:30
48
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Does Python have “private” variables in classes?
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It's cultural. In Python, you don't write to other classes' instance or class variables. In Java, nothing prevents you from doing the same if you really want to - after all, you can always edit the source of the class itsel...
Reference — What does this symbol mean in PHP?
... that come up every now and then about syntax in PHP. This is also a Community Wiki, so everyone is invited to participate in maintaining this list.
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Accessing Object Memory Address
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The Python manual has this to say about id():
Return the "identity'' of an object.
This is an integer (or long integer)
which is guaranteed to be unique and
constant for this object during its
lifetime. Two objects with
non-overlapping lifetimes may have the
same id() value. ...
Determining 32 vs 64 bit in C++
... way to reliably determine whether C++ code is being compiled in 32 vs 64 bit. We've come up with what we think is a reasonable solution using macros, but was curious to know if people could think of cases where this might fail or if there is a better way to do this. Please note we are trying to do ...
How do I avoid capturing self in blocks when implementing an API?
I have a working app and I'm working on converting it to ARC in Xcode 4.2. One of the pre-check warnings involves capturing self strongly in a block leading to a retain cycle. I've made a simple code sample to illustrate the issue. I believe I understand what this means but I'm not sure the "corre...