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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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impro...
Creating multiline strings in JavaScript
I have the following code in Ruby. I want to convert this code into JavaScript. what's the equivalent code in JS?
39 Answer...
How to pipe input to a Bash while loop and preserve variables after loop ends
...nd in the current shell environment.
Thus, using something like this in a script makes the modfied sum available after the loop:
FILECONTENT="12 Name
13 Number
14 Information"
shopt -s lastpipe # Comment this out to see the alternative behaviour
sum=0
echo "$FILECONTENT" |
while read number name;...
Ruby, Difference between exec, system and %x() or Backticks
... interpolation.
exec
By using Kernel#exec the current process (your Ruby script) is replaced with the process invoked through exec. The method can take a string as argument. In this case the string will be subject to shell expansion. When using more than one argument, then the first one is used to...