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Why is 1/1/1970 the “epoch time”?
...och date went through a couple of changes before stabilizing on what it is now.
But it does not say why exactly 1/1/1970 was chosen in the end.
Notable excerpts from the Wikipedia page:
The first edition Unix Programmer's Manual dated November 3, 1971 defines the Unix time as "the time since 00:00:...
JPA: How to have one-to-many relation of the same Entity type
..., access other entity instances, or modify relationships". Right? Let me know if I'm off.
– Dan LaRocque
Aug 3 '10 at 6:05
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Is functional GUI programming possible? [closed]
...een doing purely functional GUI programming in this style for a few months now. I LOVE it, it is such a pleasant relief from the spaghetti hell of imperative UI programming, which seems to be worse in this respect than most imperative programming.
– luqui
Apr ...
Convert columns to string in Pandas
...dability
This is self-explanatory ;-)
OK, so should I stop using it right now?
...No. As of writing this answer (version 1.1), there are no performance benefits but the docs expect future enhancements to significantly improve performance and reduce memory usage for "string" columns as opposed to ob...
How can I build a small operating system on an old desktop computer? [closed]
This might be in vain, as I know writing an operating system is unbearably complicated (especially by oneself).
20 Answers
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Search for executable files using find command
...ric questions, it is sufficient to use the POSIX-compliant -perm primary (known as a test in GNU find terminology).
-perm allows you to test for any file permissions, not just executability.
Permissions are specified as either octal or symbolic modes. Octal modes are octal numbers (e.g., 111), whe...
Referencing a string in a string array resource with xml
...dual items. You can even try in your XML to use "@array/yourarrayhere". I know that in design time you will get the first item. But that is of no practical use if you want to use, let's say... the second, of course.
HOWEVER, there is a trick you can do. See here:
Referencing an XML string in an XM...
Mark error in form using Bootstrap
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@JimStewart thank you! great to know. I'll update as soon as I have a chance
– jonschlinkert
Sep 2 '13 at 2:07
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Valid to use (anchor tag) without href attribute?
...e named anchor format is less commonly used, as the fragment identifier is now used to specify an [id] attribute (although for backwards compatibility you can still specify [name] attributes). An <a> element without an [href] attribute is still valid.
As far as semantics and styling is concer...
OSGi: What are the differences between Apache Felix and Apache Karaf?
...ich" sounds a bit like going back to the huge Java EE application servers. Now I'm not saying that Apache Karaf is anywhere near as big as those, I am just making a point that you can and should just deploy what you actually need.
– Marcel Offermans
Sep 19 '14 ...