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How to search a specific value in all tables (PostgreSQL)?
... n.nspname !~ '^(pg_|information_schema)' -- exclude system schemas
ORDER BY n.nspname, c.relname
LOOP
RETURN QUERY EXECUTE format(
'SELECT $1, ctid FROM %s t WHERE t::text ~~ %L'
, _tbl, '%' || _like_pattern || '%')
USING _tbl;
END LOOP;
END
$func$ LANGUAGE...
Redirecting Output from within Batch file
...amp;8 File 2 message 2
exit /b
I chose to use handles 9 and 8 in reverse order because that way is more likely to avoid potential permanent redirection due to a Microsoft redirection implementation design flaw when performing multiple redirections on the same command. It is highly unlikely, but ev...
Scala type programming resources
...calculus
Debasish Ghosh (blog) has some relevant posts as well:
Higher order abstractions in scala
Static typing gives you a head start
Scala implicits type classes, here I come
Refactoring into scala type-classes
Using generalized type constraints
How scalas type system words for you
Choosing b...
How to select only the records with the highest date in LINQ
...q = from n in table
group n by n.AccountId into g
select g.OrderByDescending(t=>t.Date).FirstOrDefault();
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Android Studio - How to increase Allocated Heap Size
...the Help menu, just copy and paste the variables you might want to keep in order to increase it for everversion you might have on your box.
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foll...
Abort makefile if variable not set
... :|check-defined-BAR
Notice that the check-defined-BAR is listed as the order-only (|...) prerequisite.
Pros:
(arguably) a more clean syntax
Cons:
One can't specify a custom error message
Running make -t (see Instead of Executing Recipes) will pollute your root directory with lots of check...
Find and copy files
...intent is to copy the found files into /home/shantanu/tosend, you have the order of the arguments to cp reversed:
find /home/shantanu/processed/ -name '*2011*.xml' -exec cp "{}" /home/shantanu/tosend \;
Please, note: the find command use {} as placeholder for matched file.
...
The difference between sys.stdout.write and print?
... buffers the input and might not flush the input to the fd immediately. in order to make sure that it behaves like the print function, you should add: sys.stdout.flush()
– kerbelp
Nov 16 '17 at 7:27
...
How to move a model between two Django apps (Django 1.7)
..., from an SQL point of view you can apply the trick of this answer. But in order to achieve this only via Django, one approach I can think of would be along the lines of @ozan answer, except the first step would be to duplicate the tables involved in MTM relationship (one version of the dupes in eac...
Context switches much slower in new linux kernels
...able
plain old Unix signals
I had to add
#include <stdint.h>
in order to compile, which I did with this command
g++ -O3 -o condvar-perf condvar-perf.cpp -lpthread -lrt
On kernel 2.6.32
$ ./condvar-perf 1000000
NPTL
mutex elapsed: 29085 us; per iteration: 29 ns / 9...