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What is the easiest way to duplicate an activerecord record?
...ooks like this functionality has been replaced with dup: gist.github.com/994614
– skattyadz
Jun 23 '11 at 13:01
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Anyone else find naming classes and methods one of the most difficult parts in programming? [closed]
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wkhtmltopdf: cannot connect to X server
...e called wkhtmltopdf.sh and add the following:
xvfb-run -a -s "-screen 0 640x480x16" wkhtmltopdf "$@"
Move this shell script to /usr/local/bin, and set permissions:
sudo chmod a+x /usr/local/bin/wkhtmltopdf.sh
Check to see if it works once again: run
/usr/local/bin/wkhtmltopdf.sh http://www.g...
Why doesn't String switch statement support a null case?
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As damryfbfnetsi points out in the comments, JLS §14.11 has the following note:
The prohibiti...
Error when trying to obtain a certificate: The specified item could not be found in the keychain
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Can someone explain in simple terms to me what a directed acyclic graph is?
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answered Dec 14 '12 at 11:46
smartcavemansmartcaveman
36.7k2424 gold badges113113 silver badges201201 bronze badges
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'and' (boolean) vs '&' (bitwise) - Why difference in behavior with lists vs numpy arrays?
...ave no truth value as this prevents vector-based logic confusion.
Example 4 is simply a vectorized bit and operation.
Bottom Line
If you are not dealing with arrays and are not performing math manipulations of integers, you probably want and.
If you have vectors of truth values that you wish to ...
SQL join: selecting the last records in a one-to-many relationship
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This is an example of the greatest-n-per-group problem that has appeared regularly on StackOve...
When should I use double or single quotes in JavaScript?
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