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How is CountDownLatch used in Java Multithreading?
...tDownLatch.
Any thread, usually the main thread of the application, which calls CountDownLatch.await() will wait until count reaches zero or it's interrupted by another thread. All other threads are required to count down by calling CountDownLatch.countDown() once they are completed or ready.
As ...
Replace console output in Python
...stdout.write("#" * (40 - progress_x) + "]\n")
sys.stdout.flush()
You call startProgress passing the description of the operation, then progress(x) where x is the percentage and finally endProgress()
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POST Content-Length exceeds the limit
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The restart did it for me. +1 Thanks ;)
– Refilon
Mar 28 '16 at 11:01
1
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Where can I learn how to write C code to speed up slow R functions? [closed]
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See Edit 3 and yes, you can. Meyers calls C++ a 'four paradigm' language and you do not have to use all four. Using it as 'just a better C' and use Rcpp as glue to R is perfectly fine. Nobody forces a style on you -- this ain't Java ;-)
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How to scp in Python?
...(server, port, user, password)
scp = SCPClient(ssh.get_transport())
Then call scp.get() or scp.put() to do SCP operations.
(SCPClient code)
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How to avoid “if” chains?
...tep<X>() should evaluate only if the previous one succeeded (this is called short circuit evaluation)
executeThisFunctionInAnyCase() will be executed in any case
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How to stretch div height to fill parent div - CSS
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Suppose you have
<body>
<div id="root" />
</body>
With normal CSS, you can do the following. See a working app https://github.com/onmyway133/Lyrics/blob/master/index.html
#root {
position: absolute;
top: 0;
left: 0;
height: 100%;
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How to convert a DOM node list to an array in Javascript?
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Use this simple trick
<Your array> = [].map.call(<Your dom array>, function(el) {
return el;
})
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What does the variable $this mean in PHP?
...d by the interpreter for you, that contains an array of variables.
If you call $this inside a normal method in a normal class, $this returns the Object (the class) to which that method belongs.
It's possible for $this to be undefined if the context has no parent Object.
php.net has a big page...
How is null + true a string?
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I notice the IL generated goes straight to calling Concat. I was thinking I'd see a call to the + operator function in there. Would that simply be inlining optimization?
– quentin-starin
Dec 17 '10 at 17:17
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