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sevenseacat/gist:e8bcd320fb7c5cf8d1e02694e6e48110

Created December 7, 2018 16:46
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gistfile1.txt
iex(40)> :ets.new(:foo3, [:set, :named_table])
:foo3
iex(41)> :ets.insert(:foo3, {"a", 1})
true
iex(42)> :ets.lookup(:foo3, "a")
[{"a", 1}]
iex(43)> :ets.update_counter(:foo3, "a", {0, -1, 0, 0})
** (ArgumentError) argument error
(stdlib) :ets.update_counter(:foo3, "a", {0, -1, 0, 0})
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