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Which version of PostgreSQL am I running?
... @Timo, this is a query to be run through PostgreSQL. This could be done through pgAdmin, or any other mechanism for running a query. Were you trying to run it from an Ubuntu shell? (this won't work)
– Highly Irregular
Jul 10 '14 at 2:31
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Understanding events and event handlers in C#
... "raised", it's really just "go through this list of methods and call each one, using these values as the parameters". Assigning an event handler is just a prettier, easier way of adding your method to this list of methods to be called).
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How do I revert a Git repository to a previous commit?
...ts
If, on the other hand, you want to really get rid of everything you've done since then, there are two possibilities. One, if you haven't published any of these commits, simply reset:
# This will destroy any local modifications.
# Don't do it if you have uncommitted work you want to keep.
git rese...
MySQL - UPDATE multiple rows with different values in one query
...ssumes that the user_rol, cod_office combination is a primary key. If only one of these is the primary key, then add the other field to the UPDATE list.
If neither of them is a primary key (that seems unlikely) then this approach will always create new records - probably not what is wanted.
However...
How to wait in bash for several subprocesses to finish and return exit code !=0 when any subprocess
... in array
for i in $n_procs; do
./procs[${i}] &
pids[${i}]=$!
done
# wait for all pids
for pid in ${pids[*]}; do
wait $pid
done
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Changing the default folder in Emacs
...r than editing your .emacs file, since it will allow you to have more than one shortcuts with more than one starting directory, and it lets you have the normal command line behavior of Emacs if you need it.
CWD = current working directory = PWD = present working directory. It makes a lot more sense...
Clang vs GCC - which produces faster binaries? [closed]
...GCC, but I discovered Clang recently and I'm pondering switching. There is one deciding factor though - quality (speed, memory footprint, reliability) of binaries it produces - if gcc -O3 can produce a binary that runs 1% faster, or Clang binaries take up more memory or just fail due to compiler bu...
How to create an alias for a command in Vim?
...:Write won’t. (Note that this affects any commands that match, including ones that you might not expect. For example, the command :saveas W Z will be replaced by :saveas w Z, so be careful with this.)
Update
Here is how I would write it now:
cnoreabbrev <expr> W ((getcmdtype() is# ':' &&...
ASP.NET Web API OperationCanceledException when browser cancels the request
When a user loads a page, it makes one or more ajax requests, which hit ASP.NET Web API 2 controllers. If the user navigates to another page, before these ajax requests complete, the requests are canceled by the browser. Our ELMAH HttpModule then logs two errors for each canceled request:
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What are bitwise shift (bit-shift) operators and how do they work?
... not undefined, though; the standard requires implementations to define it one way or another. However, left shifts of negative signed numbers is undefined behaviour (signed integer overflow). So unless you need arithmetic right shift, it's usually a good idea to do your bit-shifting with unsigned...