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Add an entry to a map
Given an empty pets map, add the mapping from 
erlang
erlang
erlang
Submit a new solution for erlang
There are 19 other solutions in additional languages (clojure, cpp, fantom, fsharp ...)
"rob" to "dog"
Pets1 = dict:store(rob, dog, Pets0).
ets:insert(Pets, {rob, dog}).
Pets1 = gb_trees:enter(rob, dog, Pets0).
Submit a new solution for erlang
There are 19 other solutions in additional languages (clojure, cpp, fantom, fsharp ...)
