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What's the state of the art in email validation for Rails?
...step to catch typos. I would do it with a simple regex, and not waste the CPU cycles on anything too complicated:
/\A[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]+\z/
That was adapted from http://www.regular-expressions.info/email.html -- which you should read if you really want to know all the tra...
What does threadsafe mean?
...ntee can potentially be limited to certain environments such as a specific CPU architecture, but must hold for those environments. If there is no explicit delimitation of environments, then it is usually taken to imply that it holds for all environments that the code can be compiled and executed.
T...
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UPDATE
If you're using flavors to build apks targeting different CPUs and you build for arm, armv7 and x86 and you upload them all to the store, remember to use one of them to test the inapps. If you use a "universal" build which contains all the cpu libraries (basically another build than...
Where can I get a list of Ansible pre-defined variables?
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"Pentium(R) Dual-Core CPU E5300 @ 2.60GHz"
],
"ansible_pro...
Why should the “PIMPL” idiom be used? [duplicate]
...in headers. It takes about five minutes to compile (on a decent multi-core CPU), and just parsing the headers in an otherwise empty .cpp takes about a minute. So anyone using the library has to wait a couple of minutes every time they compile their code, which makes the development quite tedious. Ho...
Check if an image is loaded (no errors) with jQuery
..., set up a "load" event handler. There shouldn't be any need to hammer the CPU by running this check multiple times.
– Michael Martin-Smucker
Apr 15 '14 at 15:03
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Why start an ArrayList with an initial capacity?
... tell ArrayList to allocate a larger storage to begin with as to not waste CPU cycles when it tries to allocate more space for the next item. Thus to allocate some space at the beginning is more effiecient.
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What is the difference between memoization and dynamic programming?
...n this approach same sub-problem can occur multiple times and consume more CPU cycle, hence increase the time complexity. Whereas in Dynamic programming same sub-problem will not be solved multiple times but the prior result will be used to optimize the solution.
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What are the most common naming conventions in C?
...ou are working on embedded project and you have 1024 bytes of RAM and 8MHz CPU.
– Kamil
Apr 23 '19 at 15:38
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Best way to serialize an NSData into a hexadeximal string
...e Gallagher's answer is sufficient for a relatively small size, memory and cpu performance deteriorate for large amounts of data. I profiled this with a 2MB file on my iPhone 5. Time comparison was 0.05 vs 12 seconds. Memory footprint is negligible with this method while the other method grew the he...