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aeris/gist:66fe472ed6dfe9d0aa2db2bc69402bda

Created June 11, 2018 15:21
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gistfile1.txt
[42] pry(main)> f = Hash.new { [] }
=> {}
[43] pry(main)> f[:foo] << :bar
=> [:bar]
[44] pry(main)> f
=> {}
[45] pry(main)> f.keys
=> []
[46] pry(main)> f[:bar]
=> []
[47] pry(main)> f[:foo]
=> []
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