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| [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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