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Exploring Docker container's file system
...e noticed with docker that I need to understand what's happening inside a container or what files exist in there. One example is downloading images from the docker index - you don't have a clue what the image contains so it's impossible to start the application.
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Why is “final” not allowed in Java 8 interface methods?
One of the most useful features of Java 8 are the new default methods on interfaces. There are essentially two reasons (there may be others) why they have been introduced:
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What's faster, SELECT DISTINCT or GROUP BY in MySQL?
...in fact this is how some databases implement DISTINCT under the hood).
If one of them is faster, it's going to be DISTINCT. This is because, although the two are the same, a query optimizer would have to catch the fact that your GROUP BY is not taking advantage of any group members, just their key...
How to set input type date's default value to today?
...me has at least supported the new input type with a spin-wheel implementation.
33 Answers
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Design by contract using assertions or exceptions? [closed]
When programming by contract a function or method first checks whether its preconditions are fulfilled, before starting to work on its responsibilities, right? The two most prominent ways to do these checks are by assert and by exception .
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Maven error “Failure to transfer…”
...e%\.m2\repository
for /r %i in (*.lastUpdated) do del %i
Then rightclick on your project in eclipse and choose Maven->"Update Project ...", make sure "Update Dependencies" is checked in the resulting dialog and click OK.
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set the width of select2 input (through Angular-ui directive)
...dth to resolve in order to preserve element width
$(document).ready(function() {
$("#myselect").select2({ width: 'resolve' });
});
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Collapsing Sidebar with Bootstrap
I just visited this page http://www.elmastudio.de/ and wondered if it is possible to build the left sidebar collapse with Bootstrap 3.
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How to colorize diff on the command line?
...that it looks good? I want it for the command line, so please no GUI solutions.
14 Answers
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Controlling fps with requestAnimationFrame?
It seems like requestAnimationFrame is the de facto way to animate things now. It worked pretty well for me for the most part, but right now I'm trying to do some canvas animations and I was wondering: Is there any way to make sure it runs at a certain fps? I understand that the purpose of rAF is ...