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An example of how to use getopts in bash

...ere it shouldn't, so change it into just h (without colon) to expect -p any_string, you need to add p: to the argument list Basically : after the option means it requires the argument. The basic syntax of getopts is (see: man bash): getopts OPTSTRING VARNAME [ARGS...] where: OPTSTRING is s...
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What's a good way to extend Error in JavaScript?

...){ Object.setPrototypeOf(CustomError, Error); } else { CustomError.__proto__ = Error; } Alternative: use Classtrophobic framework Explanation: Why extending the Error class using ES6 and Babel is a problem? Because an instance of CustomError is not anymore recognized as such. class Cus...
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Redirect all to index.php using htaccess

...ur rule so it looks something like: RewriteEngine on RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.*)$ /index.php?path=$1 [NC,L,QSA] At the moment you're just matching on . which is one instance of any character, you need at least .* to match any number of...
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Why doesn't Console.Writeline, Console.Write work in Visual Studio Express?

I just open a console application and I type 19 Answers 19 ...
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Collapsing Sidebar with Bootstrap

...//jsfiddle.net/DVE4f/359/ <div class="container" style="width:100%" ng-app ng-controller="AppCtrl"> <div class="row"> <div ng-class="showgraphSidebar ? 'col-xs-3' : 'hidden'" id="colPush" > Sidebar </div> <div ng-class="showgraphSidebar ? 'col-xs-9' : ...
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Safely override C++ virtual functions

...e keyword: class child : public parent { public: // force handle_event to override a existing function in parent // error out if the function with the correct signature does not exist void handle_event(int something) override; }; ...
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Why can't I define a default constructor for a struct in .NET?

...ublic struct Tempo { const double DefaultBpm = 120; private double _bpm; // this field must not be modified other than with its property. public double BeatsPerMinute { get => _bpm + DefaultBpm; set => _bpm = value - DefaultBpm; } } This is different than...
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IntelliJ IDEA JDK configuration on Mac OS

...hich java in terminal, it prints /Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home/bin/java and then use Home dir path to input in IntelliJ idea dialog, like this /Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home – Maxim Yefremov May...
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How to create fixed space and flexible space bar button items programmatically?

..."Today" style:UIBarButtonItemStylePlain target:self action:@selector(update_baritem:)]; todayItem.tag = 2; UIBarButtonItem *cashItem = [[UIBarButtonItem alloc] initWithTitle:@"Cash" style:UIBarButtonItemStylePlain target:self action:@selector(update_baritem:)]; cashItem.tag = 3; UIBarButtonItem *c...
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Initializing a list to a known number of elements in Python [duplicate]

...x in xrange(N)] 10 loops, best of 3: 109 ms per loop >>> def fill_list1(): """Not too bad, but complicated code""" a = [None] * N for x in xrange(N): a[x] = x**2 >>> %timeit fill_list1() 10 loops, best of 3: 126 ms per loop >>> def fill_list2(): "...