Top 10 Ruby Enumerable methods

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The methods of the Enumerable module are available in any Ruby object that behaves as a collection (such as an array, or the results of a .where() query on an ActiveRecord class)

You can see the full API of Enumerable here: http://ruby-doc.org/core-2.2.2/Enumerable.html

0. (map)[http://ruby-doc.org/core-2.2.2/Enumerable.html#method-i-map]