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How to include external Python code to use in other files?
...dostuff)
if __name__ == "__main__":
dostuff()
And from the another script or the python console
import teststuff
exec(DOSTUFF_SOURCE)
dostuff()
And now dostuff should be in the local scope and dostuff() will return the console or scripts _name_ whereas executing test.dostuff() will retu...
How can I rename a database column in a Ruby on Rails migration?
...ate a separate migration to do this. (Rename FixColumnName as you will.):
script/generate migration FixColumnName
# creates db/migrate/xxxxxxxxxx_fix_column_name.rb
Then edit the migration to do your will:
# db/migrate/xxxxxxxxxx_fix_column_name.rb
class FixColumnName < ActiveRecord::Migrati...
“unary operator expected” error in Bash if condition
...
Someone bequeathed this bug to me in a build script. Saved me some time, thanks!
– Kyle
Aug 1 '18 at 19:05
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Rails 3 execute custom sql query without a model
I need to write a standalone ruby script that is supposed to deal with database. I used code given below in rails 3
5 Answe...
How to change the default GCC compiler in Ubuntu?
...rnatives --query gcc, which might not work eg in an automated provisioning script. Also, how can this be made platform agnostic?
– ely
Jan 7 at 15:55
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Worst security hole you've seen? [closed]
...Internet Explorer had been accidentally released as being marked "safe for scripting". The object was capable of writing binary files -- OLE Automation type libraries, in fact -- to arbitrary disk locations. This meant that an attacker could craft a type library that contained certain strings of hos...
Command to change the default home directory of a user
...hing through symlinks (apache, ftpd, etc.).
You have to remember (or init script) to bind upon restarts, of course.
An example init script in /etc/fstab is
/extra-home/username /home/username none defaults,bind 0 0
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Bash if [ false ] ; returns true
...ironment variable, it's always ideal to honor that convention in one's own scripts).
– Charles Duffy
Feb 18 '17 at 5:24
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How to save all the variables in the current python session?
...oblems exist while trying to do so. For example with restoring open file descriptors.
It is better to think about serialization/deserialization subsystem for your program. It is not trivial in many cases, but is far better solution in long-time perspective.
Although if I've exaggerated the problem...
Using Caps Lock as Esc in Mac OS X
...will be lost at system reboot. If you want them to persist, put them in a script and setup a login hook:
sudo defaults write com.apple.loginwindow LoginHook /path/to/login_script.sh
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