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How to fire AJAX request Periodically?
...setInterval(). If the first request hasn't completed and you start another one, you could end up in a situation where you have multiple requests that consume shared resources and starve each other. You can avoid this problem by waiting to schedule the next request until the last one has completed:
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What is a “translation unit” in C++
...utable program.
The notion of a translation unit is
most often mentioned in the contexts
of the One Definition Rule, and
templates.
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How do I prompt a user for confirmation in bash script? [duplicate]
...islevis85's suggestion (thanks!) and added the -n option to read to accept one character without the need to press Enter. You can use one or both of these.
Also, the negated form might look like this:
read -p "Are you sure? " -n 1 -r
echo # (optional) move to a new line
if [[ ! $REPLY =~ ^[Yy]$ ]...
How to embed a video into GitHub README.md?
... links seem to be broken; they take me to github.com/contact now. Does anyone have access to an archived version? I'm having a hard time getting it out of the Google Cache or the Wayback Machine.
– Benjamin Oakes
May 2 '12 at 12:45
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random.seed(): What does it do?
...random.randint()') which generates these values on the basis of this seed. One of the must properties of random numbers is that they should be reproducible. When you put same seed, you get the same pattern of random numbers. This way you are generating them right from the start. You give a different...
How can I remove specific rules from iptables?
... table (eg nat), you have to add it to the delete command (thx to @ThorSummoner for the comment)
sudo iptables -t nat -D PREROUTING 1
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What are the best practices to follow when declaring an array in Javascript?
...t
Note that there's no way with new Array() to create an array with just one pre-specified number element in it!
Using [] is actually more efficient, and safer too! It's possible to overwrite the Array constructor and make it do odd things, but you can't overwrite the behaviour of [].
Personall...
Aliases in Windows command prompt
...d.
For completeness, here is a template to illustrate the kind of aliases one may find useful.
@echo off
:: Temporary system path at cmd startup
set PATH=%PATH%;"C:\Program Files\Sublime Text 2\"
:: Add to path by command
DOSKEY add_python26=set PATH=%PATH%;"C:\Python26\"
DOSKEY add_python33=s...
Speed up the loop operation in R
....time(dayloop2(X))
Result is
You can see that your version depends exponentially from nrow(X). Modified version has linear relation, and simple lm model predict that for 850,000 rows computation takes 6 minutes and 10 seconds.
Power of vectorization
As Shane and Calimo states in theirs answer...
Fast ceiling of an integer division in C / C++
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The second one has a problem where x is 0. ceil(0/y) = 0 but it returns 1.
– Omry Yadan
May 27 '13 at 0:52
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