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What is the 'instanceof' operator used for in Java?
...ide.
Think about it this way. Say all the houses on your block were built from the same blueprints. Ten houses (objects), one set of blueprints (class definition).
instanceof is a useful tool when you've got a collection of objects and you're not sure what they are. Let's say you've got a collecti...
How to test Spring Data repositories?
...en I change the implementation for spring-data (by extending the interface from Repository), the test fails and userRepository.findOne returns null. Any ideas of how to solve this?
– Rega
Aug 10 '19 at 20:31
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How to disable a link using only CSS?
...isabled clicking on a link. Keep in mind many users are used to open links from the context menu or by using the middle mouse button.
– Alexandru Severin
Aug 2 '17 at 12:38
ad...
How to get GET (query string) variables in Express.js on Node.js?
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I learned from the other answers and decided to use this code throughout my site:
var query = require('url').parse(req.url,true).query;
Then you can just call
var id = query.id;
var option = query.option;
where the URL for get s...
Is it better practice to use String.format over string Concatenation in Java?
...ason is that String.format() can be more easily localised with text loaded from resource files whereas concatenation can't be localised without producing a new executable with different code for each language.
If you plan on your app being localisable you should also get into the habit of specifyin...
sizeof single struct member in C
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It was recently removed from linux/kernel.h.
– Andriy Makukha
Feb 18 at 12:47
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Setting up a git remote origin
...origin G:/group/project/ # local, Win
This keeps you from having to manually edit your git config or specify branch tracking manually.
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How can I process each letter of text using Javascript?
...indows. Unix, MacOS, and internet protocols use UTF-8. charAt is left over from the UCS-2 days when there were no surrogate pairs and to address the problem a new function, codepointAt was added to JavaScript that handles our friendly pile of poo correctly. I believe Java also has it.
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Looping a video with AVFoundation AVPlayer?
...r you can use the time range
parameter of AVPlayerLooper (set time range from 0 to duration of
audio track)
It turns out that Premiere had been exporting files with an audio track of a slightly different length than the video. In my case it was fine to remove the audio entirely, and that fixed...
Is it safe to assume a GUID will always be unique?
...ill more likely to get hit by a meteorite than to have even one collision (from Wikipedia). And if you aren't generating them randomly, but are e.g. using the MAC-address-and-time-stamp algorithm, then they're also going to be unique, as MAC addresses are unique among computers and time stamps are ...