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What's the difference between :: (double colon) and -> (arrow) in PHP?

...called or a subclass of it. Example: class A { public function func_instance() { echo "in ", __METHOD__, "\n"; } public function callDynamic() { echo "in ", __METHOD__, "\n"; B::dyn(); } } class B extends A { public static $prop_static = 'B::$prop_st...
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What is the most efficient string concatenation method in python?

...iven the test case from mkoistinen's answer, having strings domain = 'some_really_long_example.com' lang = 'en' path = 'some/really/long/path/' The contenders are f'http://{domain}/{lang}/{path}' - 0.151 µs 'http://%s/%s/%s' % (domain, lang, path) - 0.321 µs 'http://' + domain + '/' + lang ...
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When writing a directive in AngularJS, how do I decide if I need no new scope, a new child scope, or

...gs ('='). On self-contained components, it doesn't make sense to need to apply other directives or attributes on it because it exists by itself. Its style is governed by its own template (if necessary) and can have the appropriate content transcluded (if necessary). It's standalone, so we put it i...
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If I have ACCESS_FINE_LOCATION already, can I omit ACCESS_COARSE_LOCATION?

I have a GPS app that already requests ACCESS_FINE_LOCATION permission in the manifest, now I want to add a library (MoPub) that requires ACCESS_COARSE_LOCATION . ...
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Creating virtual directories in IIS express

... IIS express configuration is managed by applicationhost.config. You can find it in Users\<username>\Documents\IISExpress\config folder. Inside you can find the sites section that hold a section for each IIS Express configured site. Add (or modify) a ...
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what is the right way to treat Python argparse.Namespace() as a dictionary?

...store me' >>> args.baz 'store me' Yes, it is okay to access the __dict__ attribute. It is a well-defined, tested, and guaranteed behavior. share | improve this answer | ...
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Best way to randomize an array with .NET

...o remarks that System.Random "isn't threadsafe" and "only suitable for toy apps" due to returning a time-based sequence: as used in my example, Random() is perfectly thread-safe, unless you're allowing the routine in which you randomize the array to be re-entered, in which case you'll need something...
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How is AngularJS different from jQuery

...ly focus on DOM elements and no Data CRUD, like building a website not web application, jQuery is the one of the top tools. (You can use AngularJS for this purpose as well.) AngularJS is a framework. It has following features Two way data binding MVW pattern (MVC-ish) Template Custom-directive (...
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How to get a ListBox ItemTemplate to stretch horizontally the full width of the ListBox?

...s because the IT Admin staff couldn't figure out how to deploy WPF/Winform apps using Active Directory, and we wanted a clean deployment scenario that didn't depend on us Sneakernetting the updates. – Richard B Jul 23 '12 at 13:53 ...
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T-SQL query to show table definition?

... me, but I am often on "wild" computers that have only the most bare-bones apps and I have no rights to install studio. But SQLCMD is always an option. ...