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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)
...
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.
...
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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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...
Using “super” in C++
...roposal) wrote that the proposal was implementable, technically sound, and free of major flaws, and handled multiple inheritance. On the other hand, there wasn't enough bang for the buck, and the committee should handle a thornier problem.
Michael Tiemann arrived late, and then showed that a typed...
Can I store images in MySQL [duplicate]
...a and how do I go about it? If it doesn't support image data, is there any free database that does? I will be happy if a link can be provided.
Thanks.
...
Difference between string and text in rails?
...ough (Premature optimization is ...). But knowing that text is not always "free" is good to know.
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