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What is the difference between public, protected, package-private and private in Java?
...han I expected. I uploaded the image in this color blindness simulator and tested all different modes. Even in monochromacy/achromatopsia mode the color difference is reasonable. Can you see the difference or is the simulator off? (I'm still of the opinion that red/green is very intuitive for color ...
Are non-synchronised static methods thread safe if they don't modify static class variables?
...after the code sample could have been expressed in code, perhaps as a unit test. But I do sympathize with trying to convince coworkers. "They don't believe me, or my test code, or Josh Bloch, but maybe they'll accept an answer on SO."
– som-snytt
Sep 30 '12 at ...
How to delete images from a private docker registry?
... run a private docker registry, and I want to delete all images but the latest from a repository. I don't want to delete the entire repository, just some of the images inside it. The API docs don't mention a way to do this, but surely it's possible?
...
Spinlock versus Semaphore
...nter-thread locking using machine dependent assembly instructions (such as test-and-set). It is called a spinlock because the thread simply waits in a loop ("spins") repeatedly checking until the lock becomes available (busy wait). Spinlocks are used as a substitute for mutexes, which are a facility...
YouTube iframe API: how do I control an iframe player that's already in the HTML?
...A: The API doesn't function properly at a local host (file://). Host your (test) page online, or use JSFiddle. Examples: See the links at the top of this answer.
Q: How did you know this?
A: I have spent some time to manually interpret the API's source. I concluded that I had to use the postMessage...
What's the difference between “declare class” and “interface” in TypeScript
... structure.
For example when we have the following interface:
interface test {
foo: number,
bar: string,
}
The objects which we define which have this interface type need to match the interface exactly:
// perfect match has all the properties with the right types, TS compiler will not comp...
Working with select using AngularJS's ng-options
...lready answered, but I wanted to share some more code nevertheless.
In my test I have two listboxes: car makes and car models. The models list is disabled until some make is selected. If selection in makes listbox is later reset (set to 'Select Make') then the models listbox becomes disabled again ...
jquery's append not working with svg element?
...ed as application/xhtml+xml; save with the .xhtml file extension for local testing) to get SVG to work at all. (It kind of makes sense to anyway; SVG is a properly XML-based standard.) This means you'd have to escape the < symbols inside your script block (or enclose in a CDATA section), and incl...
UTF-8: General? Bin? Unicode?
...
Really, I tested saving values like 'é' and 'e' in column with unique index and they cause duplicate error on both 'utf8_unicode_ci' and 'utf8_general_ci'. You can save them only in 'utf8_bin' collated column.
And mysql docs (in http...
Should I use pt or px?
...all. But that isn't to say there won't still be some variation. In a quick test below, the results were slightly more consistent than with keywords but not identical:
Due to the nature of pixel values, they do not cascade. If a parent element has an 18px pixel size and the child is 16px, the chil...