ets.md

   1 ---
   2 title: Erlang ETS
   3 category: Elixir
   4 layout: 2017/sheet
   5 weight: -1
   6 ---
   7
   8 ## ETS
   9
  10 ### Usage
  11
  12 ```elixir
  13 iex> table = :ets.new(:my_table, [])
  14      8211
  15 ```
  16
  17 ```elixir
  18 iex> :ets.insert(table, {:fruit, "Apple"})
  19 iex> :ets.lookup(table, :fruit)
  20      [{:fruit, "Apple"}]
  21 ```
  22
  23 ```elixir
  24 iex> :ets.delete(table)
  25 iex> :ets.delete_all_objects(table)
  26 ```
  27
  28 ### Flags
  29
  30 ```elixir
  31 iex> table = :ets.new(:my_table, [:set, :protected])
  32 ```
  33 {: .-setup}
  34
  35 | `:set` | no duplicate keys (or: `:ordered_set`, `:bag`, `:duplicate_bag`) |
  36 | `:protected` | only this process can use it (or: `:public`, `:private`) |
  37
  38 ### Ordered sets
  39
  40 ```elixir
  41 :ets.first(table)
  42 :ets.last(table)
  43 :ets.next(table, key)
  44 :ets.prev(table, key)
  45 ```
  46
  47 ## References
  48 {: .-one-column}
  49
  50 * <http://erlang.org/doc/man/ets.html>
  51 * <http://learnyousomeerlang.com/ets>