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How to upgrade PostgreSQL from version 9.6 to version 10.1 without losing data?
... Is the server running locally and accepting
connections on Unix domain socket "/var/lib/postgresql/.s.PGSQL.50432"?
This occurs because the default configuration options are applied in the absence of this switch, which results in incorrect connection options being used, hence the s...
Build the full path filename in Python
...ipt like:
# on windows-based systems
python script.py year
# on unix-based systems
./script.py year
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Execute and get the output of a shell command in node.js
In a node.js, I'd like to find a way to obtain the output of a Unix terminal command. Is there any way to do this?
5 Answer...
PHP: Convert any string to UTF-8 without knowing the original character set, or at least try
...ed through your forms is utf_8. Concerning uploaded files, try running the unix 'file -i' command on it through e.g. exec() (if possible on your server) to aid the detection (using the document's BOM.)
Concerning scraping data, you could read the HTTP headers, that usually specify the charset. When ...
Ignore Xcode warnings when using Cocoapods
...hecker -Xanalyzer security -Xanalyzer -analyzer-disable-checker -Xanalyzer unix
Note that setting this on the Pods Project or Pods Target will not work. I'm not sure why, but you have to set it for each actual Pod- target.
You can also set the compiler flags (-w -Xanalyzer -analyzer-disable-checke...
Google Authenticator implementation in Python
...th systems have correct time set (meaning that they both generate the same Unix timestamp in any given moment in time).
Make sure to protect yourself from brute-force attack. If time-based password is used, then trying 1000000 values in less than 30 seconds gives 100% chance of guessing the password...
Difference between ProcessBuilder and Runtime.exec()
...isleading, because it states that cmd.exe or equivalent (i.e. /bin/bash on unix) would be run, which does not seem to be the case. Instead tokenization is done inside the Java environment.
– Stefan Paul Noack
Oct 17 '14 at 18:49
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How do I validate a date string format in python?
...ith dates and times a lot (in the sense of datetime objects, as opposed to unix timestamp floats), it's a good idea to look into the pytz module, and for storage/db, store everything in UTC.
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How do I capture the output into a variable from an external process in PowerShell?
... an external program, you must shell out to cmd.exe /c (Windows) or sh -c (Unix), save to a file there, then read that file in PowerShell. See this answer for more information.
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Simple argparse example wanted: 1 argument, 3 results
...h runtime option. You will see this, for example, in almost every standard Unix/Linux utility; do a man cp or man ls and you'll find that many options come in both flavors (e.g. -f, --force). There are probably widely varying reasons why people prefer one or the other, but in any case it's pretty st...