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Copy a table from one database to another in Postgres
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Extract the table and pipe it directly to the target database:
pg_dump -t table_to_copy source_db | psql target_db
Note: If the other database already has the table set up, you should use the -a flag to import data only, else you may see weird e...
How to log PostgreSQL queries?
...ian and Ubuntu GNU/Linux, this file usually resides at /etc/postgresql/$v/main/postgresql.conf, where $v is the server version. Also, on the aforementioned systems, when log_destination = 'stderr', the output is written to /var/log/postgresql/postgresql-$v-main.log, where $v is the server version (n...
How to allow to accept only image files?
... anything at all, so be sure to test your target platforms well.
For detailed browser support, see http://caniuse.com/#feat=input-file-accept
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How do I log a Python error with debug information?
...is None:
ex_traceback = ex.__traceback__
tb_lines = [ line.rstrip('\n') for line in
traceback.format_exception(ex.__class__, ex, ex_traceback)]
exception_logger.log(tb_lines)
Use it in Python 2:
try:
# your function call is here
except Exception as ex:
_,...
Combining node.js and Python
... I would use Unix sockets if both processes run on the same server and TCP/IP sockets otherwise. For marshaling protocol I would take JSON or protocol buffer. If threaded Python shows up to be a bottleneck, consider using Twisted Python, which
provides the same event driven concurrency as do node.js...
How do I list all files of a directory?
...swer this question. glob.glob("*") would.
– Jean-François Fabre♦
May 17 '19 at 18:36
beautiful!!!! so.... x=glob.gl...
Simulate delayed and dropped packets on Linux
...ke a normal distribution to describe the variation in delay. The netem discipline can take a table to specify a non-uniform distribution.
# tc qdisc change dev eth0 root netem delay 100ms 20ms distribution normal
The actual tables (normal, pareto, paretonormal) are generated as part of the ip...
curl: (60) SSL certificate problem: unable to get local issuer certificate
...lo Server Hello, Certificate, Server Hello Done Alert (level : Fatal, Description: unknown CA (48)) Can you please guide me and help me out in this ?
– user3812540
Jul 8 '14 at 4:44
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HTML5 Email Validation
It is said "With HTML5, we need no more js or a server side code to check if the user's input is a valid email or url address"
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How to set HTTP header to UTF-8 using PHP which is valid in W3C validator?
...her part of the content type separately (for example, you have some text/plain pages, and some text/html pages, but they are all UTF8.) Is my understanding correct?
– Eric Seastrand
Jan 29 '15 at 15:55
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