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Auto increment primary key in SQL Server Management Studio 2012
...on any RDBMS because such a feature would be a strange combination of "not free" (performance-wise) and "not desirable" (at least in most applications).
– Paul Groke
Mar 6 '17 at 19:01
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Sleep in JavaScript - delay between actions
...tion for JavaScript, it's best to use setTimeout if possible as it doesn't freeze everything during the sleep period.
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Objective-C Static Class Level variables
.... (Thus the method may never be invoked if the class is not used.)".
Feel free to use the static variable within any ClassA class/instance method.
Code sample:
file: classA.m
static ClassB *classVariableName = nil;
@implementation ClassA
...
+(void) initialize
{
if (! classVariableName)
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How to change size of split screen emacs windows?
...ortazar I haven't use Emacs for years. This answer may not apply now. Feel free to update it.
– wilbeibi
Dec 8 '17 at 0:34
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How do I check if a variable exists?
...fore use:
try:
myVar
except NameError:
myVar = None
# Now you're free to use myVar without Python complaining.
However, I'm still not convinced that's a good idea - in my opinion, you should try to refactor your code so that this situation does not occur.
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Why is “import *” bad?
...l kind of bugs before they happen.
Of course since this is python -- feel free to break rules, and to explore -- but be wary of projects that could grow tenfold, if the source code is missing discipline it will be a problem.
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Drop shadow for PNG image in CSS
I have a PNG image, that has free form (non square).
15 Answers
15
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Are multiple `.gitignore`s frowned on?
...
you can also use ".git/info/exclude" file for that
– Ayell
May 19 '16 at 0:01
11
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Is int[] a reference type or a value type?
...is
automatically discarded when that method returns. You cannot
explicitly free the memory allocated with stackalloc. A stack
allocated memory block is not subject to garbage collection and
doesn't have to be pinned with a fixed statement.
An example of stackalloc usage:
Span<int> numbers...
What is the difference between JDK and JRE?
...
I don't have information to be completely sure, but my guess would be that either you didn't really set the classpath correctly, or you set the classpath for a different classloader than the one that ended up using your code. What makes l...