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String concatenation vs. string substitution in Python

... large boosts in performance..." If performance matters, this is good to know. However, performance problems I've seen have never come down to string operations. I've generally gotten in trouble with I/O, sorting and O(n2) operations being the bottlenecks. Until string operations are the perfor...
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Why use @PostConstruct?

... With @PostConstruct being removed in Java 11, how can we now handle this real world example with Java 11? – tet Oct 30 '18 at 9:40 ...
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Java Generics: Cannot cast List to List? [duplicate]

...ith Tree. You can't call b1.add(...) precisely because the compiler won't know whether it's safe or not. Have a look at this section of Angelika Langer's Java Generics FAQ for more information. share | ...
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Explaining difference between automaticallyAdjustsScrollViewInsets, extendedLayoutIncludesOpaqueBars

... the red background extends behind the navigation bar and the status bar. Now, you are going to set that value to UIRectEdgeNone, so you are telling the view controller to not extend the view to cover the screen: UIViewController *viewController = [[UIViewController alloc] init]; viewController.vi...
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Scala list concatenation, ::: vs ++

... So is it best practice to avoid ::: in favour of ++ now? Also use +: instead of ::? – Luigi Plinge Jul 2 '11 at 23:30 ...
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How To Launch Git Bash from DOS Command Line?

...indow cmd, and this causes strange behavior. I put this in a .bat file and now all is well: @"%SYSTEMDRIVE%\Program Files\Git\bin\bash.exe" --login – Grault Sep 3 '15 at 21:36 ...
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Git, How to reset origin/master to a commit?

... I followed this steps and it rolled back. But the origin/HEAD is now pointing to a branch other than master. What can I do to fix this? – Daniil Shevelev Dec 20 '13 at 20:29 ...
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How to update the value stored in Dictionary in C#?

... So this simple method seems also to be a better substitute for the well known ".Add" and ".TryGetValue" method without the necessity to change the value. (?) At least, if it doesn't matter to overwrite keys, for example in a situation where it is not excluded that keys are written more than once i...
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How do you create a hidden div that doesn't create a line break or horizontal space?

... div from display: none to display: inline-block or equivalent without the now-displayed div taking up space and moving my other DOM elements around? – bpromas Sep 25 '15 at 18:23 ...
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What does PHP keyword 'var' do?

... If it's de-deprecated, what's the best practice now in 5.3 - to use it or not to use it? Can you use it like private var $foo = 'bar';? – Tom Auger May 11 '11 at 15:01 ...