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How do I check out a remote Git branch?
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Get lengths of a list in a jinja2 template
... You could use none build-in function to test for None. Check more here: https://jinja.palletsprojects.com/en/2.10.x/templates/#none. Example is on this thread: https://stackoverflow.com/questions/19614027/jinja2-template-variable-if-none-object-set-a-default-value
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How to elegantly rename all keys in a hash in Ruby? [duplicate]
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Sign APK without putting keystore info in build.gradle
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112
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NPM modules won't install globally without sudo
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How do I get the SharedPreferences from a PreferenceActivity in Android?
...kage defines classes to implement application preferences UI.
To see some more examples check Android's Data Storage post on developers site.
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PDOException “could not find driver”
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Remove the first character of a string
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The last example could be more easily done using s.replace(":", "", 1)-
– Sven Marnach
Feb 9 '11 at 14:12
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Prevent user from seeing previously visited secured page after logout
...u need to specify the URL pattern of /app/*.
@WebFilter("/app/*")
Even more, you can do this job in the same Filter as where you're checking the presence of the logged-in user.
Don't forget to clear browser cache before testing! ;)
See also:
Authentication filter and servlet for login
How to...
PostgreSQL function for last inserted ID
... created with the SERIAL pseudo-type. To avoid relying on this and to feel more clean, you can use instead pg_get_serial_sequence:
INSERT INTO persons (lastname,firstname) VALUES ('Smith', 'John');
SELECT currval(pg_get_serial_sequence('persons','id'));
Caveat: currval() only works after an I...