https://blogs.oracle.com/ksplice/entry/the_top_10_tricks_of
http://www.math.harvard.edu/computing/perl/oneliners.txt
https://wiki.python.org/moin/Powerful%20Python%20One-Liners
https://blogs.oracle.com/ksplice/entry/the_top_10_tricks_of
http://www.math.harvard.edu/computing/perl/oneliners.txt
https://wiki.python.org/moin/Powerful%20Python%20One-Liners