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What does the question mark in Java generics' type parameter mean?

...4. Update: PDF link was updated since Oracle removed it a while back. It now points to the copy hosted by the Queen Mary University of London's School of Electronic Engineering and Computer Science. Update 2: Lets go into a bit more detail as to why you'd want to use wildcards. If you declare a ...
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How to make vi redraw screen?

... I've been using ctrl+L for such purposes for 35 years now, what's wrong with it? share | improve this answer | follow | ...
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How to set up Android emulator proxy settings

... Now there is a setting in Android emulator share | improve this answer | follow | ...
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Automatic Preferred Max Layout Width is not available on iOS versions prior to 8.0

...e as marking explicit and setting the value 0. Update 1: This bug has now been fixed in Xcode 6 GM. Original Answer This is a bug in Xcode6-Beta6 and XCode6-Beta7 and can be safely ignored for now. An Apple engineer in the Apple Developer forums had this to say about the bug: Preferred ma...
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Different font size of strings in the same TextView

... require. String s= "Hello Everyone"; String[] each = s.split(" "); Now apply span to the string and add the same to textview. share | improve this answer | follow ...
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How do I find out what version of WordPress is running?

... On the Admin Panel Dashboard, you can find a box called "Right Now". There you can see the version of the WordPress installation. I have seen this result in WordPress 3.2.1. You can also see this in version 3.7.1 UPDATE: In WP Version 3.8.3 In WP Version 3.9.1 Admin Side, You can...
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Null or default comparison of generic argument in C#

... @Jordan here's the IL for that - as you can see, it clearly boxes. Now, whether boxing is an issue for you is contextual. It clearly won't matter for your example since the program exits straight away. However, every box is an allocation. If you deal with anything non-trivial, avoiding unnec...
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Set Django IntegerField by choices=… name

...n the admin! I have tested that the value really changes! What should I do now? – Mahdi Dec 13 '13 at 18:59 This is th...
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sed one-liner to convert all uppercase to lowercase?

...oned, BSD sed doesn't support it). Try reading the top line of man sed to know which version you're using. – Ryder Dec 8 '17 at 10:48 ...
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How do I return the response from an asynchronous call?

...ejected. Important: You can only use await inside an async function. Right now, top-level await isn't yet supported, so you might have to make an async IIFE (Immediately Invoked Function Expression) to start an async context. You can read more about async and await on MDN. Here is an example that bu...