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What is the curiously recurring template pattern (CRTP)?

...ss A : public X<A> {...}; It is curiously recurring, isn't it? :) Now, what does this give you? This actually gives the X template the ability to be a base class for its specializations. For example, you could make a generic singleton class (simplified version) like this template <cl...
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How to output in CLI during execution of PHP Unit tests?

...t (or conf file has beStrictAboutOutputDuringTests="true") - documentation now says "A test that emits output, for instance by invoking print in either the test code or the tested code, will be marked as risky when this check is enabled." phpunit.readthedocs.io/en/8.4/risky-tests.html#risky-tests ...
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Is there a way to change the spacing between legend items in ggplot2?

... Now that opts is deprecated in ggplot2 package, function theme should be used instead: library(grid) # for unit() ... + theme(legend.key.height=unit(3,"line")) ... + theme(legend.key.width=unit(3,"line")) ...
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Left Align Cells in UICollectionView

... the array. You may look into the source code for its implementation.) So now the only thing we have to do is to implement the layoutAttributesForItem(at indexPath: IndexPath) function properly. The super class UICollectionViewFlowLayout already puts the correct number of cells in each line so we o...
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PyLint, PyChecker or PyFlakes? [closed]

...dy, but I like it ;-) Cons of PyLint: Some rules are really strict. I know that you can change it and that the default is to match PEP8, but is it such a crime to write 'for x in seq'? Apparently yes because you can't write a variable name with less than 3 letters. I will change that. Very very ...
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Seeing escape characters when pressing the arrow keys in python shell

...vel on CentOS and then readline installed no problem. Interactive shell is now working. – one.time Apr 7 '16 at 15:26 ...
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How to use background thread in swift?

..., after the previous code in outer block") }) }) Pre Swift 1.2 – Known issue As of Swift 1.1 Apple didn't support the above syntax without some modifications. Passing QOS_CLASS_BACKGROUND didn't actually work, instead use Int(QOS_CLASS_BACKGROUND.value). For more information see Apples do...
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Multithreading: What is the point of more threads than cores?

...ou probably have several hundred threads all running on your machine right now. You won't ever get a situation where a thread runs without having time 'stolen' from it. (Well, you might if it's running real-time, if you're using a realtime OS or, even on Windows, use a real-time thread priority. ...
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Git hook to send email notification on repo changes

... email. Also there are images made according to the process: And now for the grand final I have the answer which is tested and approved at my side. How to send email to ALL development team members, when gitHub's Service Hooks->Email allows only at most 2 recipients }. The answer is c...
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Measure execution time for a Java method [duplicate]

...tTime); In Java 8 (output format is ISO-8601): Instant start = Instant.now(); Thread.sleep(63553); Instant end = Instant.now(); System.out.println(Duration.between(start, end)); // prints PT1M3.553S Guava Stopwatch: Stopwatch stopwatch = Stopwatch.createStarted(); myCall(); stopwatch.stop(); ...