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Is there a way to detect if a browser window is not currently active?
I have JavaScript that is doing activity periodically. When the user is not looking at the site (i.e., the window or tab does not have focus), it'd be nice to not run.
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Checking if an instance's class implements an interface?
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As therefromhere points out, you can use class_implements(). Just as with Reflection, this allows you to specify the class name as a string and doesn't require an instance of the class:
interface IInterface
{
}
class TheClass implements IInterface
{
}
$interfaces = cl...
Are there any JavaScript static analysis tools? [closed]
... Dec 14 '11 at 4:54
Andrew Marshall
87.3k1818 gold badges202202 silver badges204204 bronze badges
answered Apr 2 '09 at 17:46
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How to get an absolute file path in Python
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Note: On most platforms, this is equivalent to calling the function normpath() as follows: normpath(join(os.getcwd(), path)). So if mydir/myfile.txt do not under os.getcwd(), the absolute path is not the real path.
– coanor
Nov 25 '14...
How to properly compare two Integers in Java?
...ystem.out.println(x == y);
is guaranteed to print false. Interning of "small" autoboxed values can lead to tricky results:
Integer x = 10;
Integer y = 10;
System.out.println(x == y);
This will print true, due to the rules of boxing (JLS section 5.1.7). It's still reference equality being used,...
How to fix the aspect ratio in ggplot?
...you need to adjust this with the limits of the variables or plot area (not all limits are nicely divisible by whole numbers like these examples).
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What is a “cache-friendly” code?
...her end of the memory spectrum (DRAM), the memory is very cheap (i.e. literally millions of times cheaper) but takes hundreds of cycles after a request to receive the data. To bridge this gap between super fast and expensive and super slow and cheap are the cache memories, named L1, L2, L3 in decre...
How to select the row with the maximum value in each group
...ata.table) ## 1.9.2
group <- as.data.table(group)
If you want to keep all the entries corresponding to max values of pt within each group:
group[group[, .I[pt == max(pt)], by=Subject]$V1]
# Subject pt Event
# 1: 1 5 2
# 2: 2 17 2
# 3: 3 5 2
If you'd like ju...
ERROR: Error 1005: Can't create table (errno: 121)
...nswered Sep 27 '12 at 14:39
DorvallaDorvalla
4,02722 gold badges2121 silver badges3939 bronze badges
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Make absolute positioned div expand parent div height
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I'm marking this as it technically is the correct way, though I found another solution to my problem, which is practically to nest the required css on the specific pages which has to differenciate (2 out of 40 at the moment).
– user5...