There are some new Hash operators in Ruby 2.3:
Reddit collection of some useful things to know and use in Ruby.
You can easily get the end of the month, or end of the year, via
sending in a negative 1 to the various date and time constructors:
Today I Learned: Kernel#gets does more than IO#gets does, it is
not simply a shorthand way of reading from STDIN.
A great post from @tenderlove on some interesting performance aspects
of using strings for keys in hashes:
The difference between first and take is subtle.