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Zero-based month numbering [closed]
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The use of zero to start counting is actually an optimization trick from Assembly programmers. Instead of assigning 1 to the count register, they XOR'ed the register with itself, which was slightly faster in CPU cycles. This meant that counting would start with 0 an...
Why do we use volatile keyword? [duplicate]
...imizing the while loop. That is where the volatile keyword plays its role. All you need to do is this,
volatile int some_int = 100; //note the 'volatile' qualifier now!
In other words, I would explain this as follows:
volatile tells the compiler that,
"Hey compiler, I'm volatile and, you
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When is .then(success, fail) considered an antipattern for promises?
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What's the difference?
The .then() call will return a promise that will be rejected in case the callback throws an error. This means, when your success logger fails, the error would be passed to the following .catch() callback, but not to the fail callback that...
Using str_replace so that it only acts on the first match?
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There's no version of it, but the solution isn't hacky at all.
$pos = strpos($haystack, $needle);
if ($pos !== false) {
$newstring = substr_replace($haystack, $replace, $pos, strlen($needle));
}
Pretty easy, and saves the performance penalty of regular expressions.
Bonus: If...
PHP server on local machine?
...d I'm wanting to test my PHP files without uploading them to my host. Basically testing them on my own machine before I upload them. How do I do that?
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What is the difference between Spring, Struts, Hibernate, JavaServer Faces, Tapestry?
...ased presentation framework.
JavaServer Pages is a view technology used by all mentioned presentation framework for the view.
Tapestry is another component-based presentation framework.
So, to summarize:
Struts 2, JSF, Tapestry (and Wicket, Spring MVC, Stripes) are presentation frameworks. If yo...
Check if Internet Connection Exists with Javascript? [duplicate]
...browsers, doing so with older web browsers may not work as expected, or at all.
Alternatively, an XHR request to your own server isn't that bad of a method for testing your connectivity. Considering one of the other answers state that there are too many points of failure for an XHR, if your XHR is ...
config.assets.compile=true in Rails production, why not?
The default Rails app installed by rails new has config.assets.compile = false in production.
7 Answers
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How to specify the location with wget?
... prefix to prefix. The directory prefix is the
directory where all other files and sub-directories will be
saved to, i.e. the top of the retrieval tree. The default
is . (the current directory).
So you need to add -P /tmp/cron_test/ (short form) or --directory-pr...
Delete topic in Kafka 0.8.1.1
...he easiest way to do that (if you don't care about up time) is to shutdown all your brokers, delete your logs for that topic and changing you ZK namespace.
– frank
Jun 18 '14 at 16:16
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