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Practical usage of setjmp and longjmp in C
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And in the footnote 248) it reads: "For example, by executing a return statement or because another longjmp call has caused a transfer to a setjmp invocation in a function earlier in the set of nested calls." So calling a longjmp funtion out of a functi...
When should one use a spinlock instead of mutex?
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The Theory
In theory, when a thread tries to lock a mutex and it does not succeed, because the mutex is already locked, it will go to sleep, immediately allowing another thread to run. It will continue to sleep until being woken up, which will be the case ...
Should I use a data.frame or a matrix?
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Part of the answer is contained already in your question: You use data frames if columns (variables) can be expected to be of different types (numeric/character/logical etc.). Matrices are for data of the same type.
Consequently, the choice matrix/data.fram...
How is Perl's @INC constructed? (aka What are all the ways of affecting where Perl modules are searc
...$ env -i perl -V
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@INC:
/usr/lib/perl5/site_perl/5.18.0/x86_64-linux-thread-multi-ld
/usr/lib/perl5/site_perl/5.18.0
/usr/lib/perl5/5.18.0/x86_64-linux-thread-multi-ld
/usr/lib/perl5/5.18.0
.
Note . at the end; this is the current directory (which is not necessarily the same as the scrip...
CSS selector for first element with class
... According to caniuse the :nth-child(1 of .foo) extension has already been implemented on Safari 9.1+ . (I haven't checked though)
– Danield
Sep 14 '16 at 6:25
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If Python is interpreted, what are .pyc files?
...n hardcover binding -- after all, it's a book that's typically meant to be read over and over, bookmarked at several places, thumbed through looking for given chapter-and-verse pointers, etc, etc, and a good hardcover binding can make a given copy last longer under such use. However, these are mund...
Optimizing away a “while(1);” in C++0x
... never writes to count2. Thus
it could be run in parallel with another thread that accesses or
updates count2. This is no longer safe with the transformed version
which does access count2 in spite of the infinite loop. Thus the
transformation potentially introduces a data race.
In cases...
Difference between Repository and Service Layer?
...m the storage format to you business objects. It should handle both how to read and write data(delete, update too) from and to the storage.
The purpose of service layer on the other hand is to encapsulate business logic into a single place to promote code reuse and separations of concerns. What th...
How to implement has_many :through relationships with Mongoid and mongodb?
...k() sinstead of .map is MUCH faster. Can you update your answer for future readers ?
– Cyril Duchon-Doris
Apr 29 '15 at 21:24
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How to have favicon / icon set when bookmarklet dragged to toolbar?
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After reading the tapper[ware] and Restafarian site, here's the simplest solution I could come up with:
<a href="javascript:
var title = window.location.href;
if (title.indexOf('http://yourwebsite/bookmarklet/') == 0) {
'...