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Is it safe to use -1 to set all bits to true?
... the variable anyway, which would call for something like boost::uint16_t, etc.
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How should I call 3 functions in order to execute them one after the other?
...stById() line or try changing name of an author so it doesn't match a post etc)
– JGFMK
Feb 14 '19 at 12:17
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What's the best way to iterate over two or more containers simultaneously
... start over; or some other pattern; or more than two containers at a time; etc ...
However, if you wanted to make your own "for_each" style function that iterates through two containers only up to the length of the shortest one, you could do something like this:
template <typename Container1, t...
Caching a jquery ajax response in javascript/browser
...ired libraries that used methods other than jquery (like dojo, native xhr, etc). I wrote a plugin for one of my own libraries to cache ajax requests as efficiently as possible in a way that would work in all major browsers, regardless of which libraries were being used to make the ajax call.
The so...
Regular expression for letters, numbers and - _
...ollow your specification, but note that this will match things like ....., etc, which may or may not be what you desire. If you can be more specific what pattern you want to match, the regex will be slightly more complicated.
The above regex also matches the empty string. If you need at least one c...
PostgreSQL Crosstab Query
...you might have attributes of different kind and output text, date, numeric etc. for respective attributes. There is a code example at the end of the chapter crosstab(text, text) in the manual.
db<>fiddle here
Advanced examples
Pivot on Multiple Columns using Tablefunc - also demonstrating...
What happens to a detached thread when main() exits?
...ishes destroying static objects, running atexit handlers, flushing streams etc. it returns control to the host environment, i.e. the process exits. If a detached thread is still running (and has somehow avoided undefined behaviour by not touching anything outside its own thread) then it just disappe...
Rails I18n validation deprecation warning
... of the previously mentioned methods (default_locale=, locale=, translate, etc), make sure to do it after setting the config.i18n.enforce_available_locales setting. Otherwise, the deprecation warning will keep on popping up. (Thanks Fábio Batista).
If you use third party gems that include I18n feat...
CFLAGS vs CPPFLAGS
...it in CPPFLAGS, if it's for a specific language put it in CFLAGS, CXXFLAGS etc. Examples of the latter type include standard compliance or warning flags - you wouldn't want to pass -std=c99 to your C++ compiler!
You might then end up with something like this in your makefile
CPPFLAGS=-I/usr/includ...
If threads share the same PID, how can they be identified?
...ad ID's are usually managed by the thread library itself (such as pthread, etc...). If the 4 threads are started they should have the same PID. The kernel itself will handle thread scheduling and such but the library is the one that is going to be managing the threads (whether they can run or not de...