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What is a serialVersionUID and why should I use it?
...hods, readResolve/writeReplace() methods, serializableFields declarations, etc, to make sure that the stream remains compatible. Changing the actual serialVersionUID is a last resort, a counsel of despair.
– Marquis of Lorne
Dec 12 '12 at 0:59
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The difference between try/catch/throw and try/catch(e)/throw e
...eptinons - OutOfRangeException comes to mind - or need to log the message, etc. The first seems to be a wildcard exception handler similar to try{}catch(...){} in c++.
– 3Dave
Nov 8 '09 at 17:22
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What is the difference between save and export in Docker?
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The short answer is:
save will fetch an image : for a VM or a physical server, that would be the installation .ISO image or disk. The base operating system.
It will pack the layers and metadata of all the chain required to build the image. You can then loa...
How often does python flush to a file?
... mean data loss if that copy never gets written (disk removed, OS crashes, etc). flush() tells Python to immediately write that buffer back to disk. (Then, os.fsync() tells the OS to also do it. There are many layers of buffers...)
– Rena
Jan 11 at 20:57
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How do I ignore the initial load when watching model changes in AngularJS?
...se !== since null and undefined will match in this situation, or ('1' == 1 etc)
– Jamie Pate
Feb 18 '17 at 0:42
in gen...
REST response code for invalid data
...te the updated HTTP/1.1 RFCs: 400 Bad Request, 409 Conflict, 403 Forbidden etc. live in tools.ietf.org/html/rfc7231 ; 412 Precondition Failed is in tools.ietf.org/html/rfc7232#section-4.2
– Matty K
Jul 3 '14 at 3:49
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How do I add files without dots in them (all extension-less files) to the gitignore file?
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In my folders there are lots of files with *.c, *.h, *.txt, *.csv etc. extensions and binary files without any extension. So I needed to ignore all files execpt *.c,*.h and .gitignore, So this works for me, from the .gitignore example:
*/* #ignore all files in each directory
!*/*...
How to initialize a JavaScript Date to a particular time zone
...* 1000;
// Use the timestamp and offset as necessary to calculate min/sec etc, i.e. for countdowns.
var timestamp = mydate.getTime() + offset,
seconds = Math.floor(timestamp / 1000) % 60,
minutes = Math.floor(timestamp / 1000 / 60) % 60,
hours = Math.floor(timestamp / 1000 / 60 / 60);...
If vs. Switch Speed
...tch" like statements internally that have a mix of ranges, single targets, etc -- and they can (and do) do this for both switch and if..else statements.
Anyhoo, an extension to Konrad's answer is that the compiler may generate a jump table, but that's not necessarily guaranteed (nor desirable). Fo...
What are sessions? How do they work?
...he page, the REFERRER or the page that linked to the page being requested, etc. Some web server software adds their own headers or transfer additional session data specific to the server software. But the standard ones are pretty well documented.
Hope that helps.
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