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Is there a Mutex in Java?
...acle.com/technetwork/articles/javase/index-140767.html
It has a slightly different pattern which is (I think) what you are looking for:
try {
mutex.acquire();
try {
// do something
} finally {
mutex.release();
}
} catch(InterruptedException ie) {
// ...
}
In this usage, you're ...
Difference between document.addEventListener and window.addEventListener?
...
The document and window are different objects and they have some different events. Using addEventListener() on them listens to events destined for a different object. You should use the one that actually has the event you are interested in.
For exampl...
How to get first element in a list of tuples?
...of tuple objects, not a list of sets (as your original question implied). If it is actually a list of sets, then there is no first element because sets have no order.
Here I've created a flat list because generally that seems more useful than creating a list of 1 element tuples. However, you can ...
nginx error connect to php5-fpm.sock failed (13: Permission denied)
...- sudo service php5-fpm restart or sudo service php7.0-fpm restart
Note: if your webserver runs as user other than www-data, you will need to update the www.conf file accordingly
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bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: lxml. Do you need
...c OS 10.7.x. I have Python 2.7.1, and followed this tutorial to get Beautiful Soup and lxml, which both installed successfully and work with a separate test file located here . In the Python script that causes this error, I have included this line:
from pageCrawler import comparePages
And i...
Add custom headers to WebView resource requests - android
... to these requests. My goal is to add custom HTTP headers to all requests. If this can be achieved using the shouldInterceptRequest method, can you please explain how?
– MediumOne
Feb 1 '13 at 6:41
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Javascript dynamically invoke object method from string
...
if the name of the property is stored in a variable, use []
foo[method]();
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Separators for Navigation
...he first one.
For example:
#nav li + li {
background:url('seperator.gif') no-repeat top left;
padding-left: 10px
}
This CSS adds the image to every list item that follows another list item - in other words all of them but the first.
NB. Be aware the adjacent selector (li + li) doesn't w...
Does Redis persist data?
...abase that guarantees data consistency. Therefore its use cases typically differ from those of real databases:
You can, for example, store sessions, performance counters or whatever in it with unmatched performance and no real loss in case of a crash. But processing orders/purchase histories and so ...
What does “=>” mean in PHP?
...ke "a => b" means, for an associative array (some languages, like Perl, if I remember correctly, call those "hash"), that 'a' is a key, and 'b' a value.
You might want to take a look at the documentations of, at least:
foreach
arrays
Here, you are having an array, called $user_list, and you ...