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Instance variables vs. class variables in Python
...all variables per-instance, simply because they will be accessed (a little bit) faster (one less level of "lookup" due to the "inheritance" from class to instance), and there are no downsides to weigh against this small advantage.
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Attach a file from MemoryStream to a MailMessage in C#
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A bit of a late entry - but hopefully still useful to someone out there:-
Here's a simplified snippet for sending an in-memory string as an email attachment (a CSV file in this particular case).
using (var stream = new Memor...
String's Maximum length in Java - calling length() method
...th of String in java is 2147483647.
Primitive data type int is 4 bytes(32 bits) in java.As 1 bit (MSB) is used as a sign bit,The range is constrained within -2^31 to 2^31-1 (-2147483648 to 2147483647).
We cannot use negative values for indexing.So obviously the range we can use is from 0 to 2147483...
Most Useful Attributes [closed]
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Be careful with this, it bites much bigger chunk out of your CPU than ToString.
– Nikola Radosavljević
Nov 22 '11 at 0:42
1
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What does SynchronizationContext do?
...es end up running is dependent on the type of SynchronizationContext used.
Windows Forms will install a WindowsFormsSynchronizationContext on the thread on which the first form is created. (This thread is commonly called "the UI thread".) This type of synchronization context invokes the delegates pa...
Format floats with standard json module
...> sys.version
'2.7.1 (r271:86832, Nov 27 2010, 18:30:46) [MSC v.1500 32 bit (Intel)]'
>>> json.dumps(1.0/3.0)
'0.3333333333333333'
>>> json.dumps(round(1.0/3.0, 2))
'0.33'
This works because Python 2.7 made float rounding more consistent. Unfortunately this does not work in Py...
How do I call setattr() on the current module?
...ule scope, the latter is equivalent to:
vars()[name] = value
which is a bit more concise, but doesn't work from within a function (vars() gives the variables of the scope it's called at: the module's variables when called at global scope, and then it's OK to use it R/W, but the function's variabl...
How do I format a long integer as a string without separator in Java?
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I struggled with this a little bit when trying to do "real world" patterns with internationalization, etc. Specifically, we have a need to use a "choice" format where the output depends upon the values being displayed, and that's what java.text.ChoiceForma...
Qt 5.1.1: Application failed to start because platform plugin “windows” is missing
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answered Dec 10 '13 at 13:43
AnonymousAnonymous
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Why use String.Format? [duplicate]
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Besides being a bit easier to read and adding a few more operators, it's also beneficial if your application is internationalized. A lot of times the variables are numbers or key words which will be in a different order for different langua...