Ruby’s implementation of to_h has finally been added to the core Array class. This method converts our multidimensional array into a key-value store. >> [[1,2]].to_h => {1=>2}   >> [[1,2], [:party, :fun_times]].to_h => {1=>2, :party=>:fun_times}   >> [1,2].to_h TypeError: wrong element type Fixnum at 0 (expected array) :)