cheatsheets/ets.md

41 lines
714 B
Markdown

---
title: Erlang ETS
category: Elixir
---
```elixir
iex> table = :ets.new(:my_table, [])
8211
iex> :ets.insert(table, {:fruit, "Apple"})
iex> :ets.lookup(table, :fruit)
[{:fruit, "Apple"}]
iex> :ets.delete(table)
iex> :ets.delete_all_objects(table)
```
### Flags
```
iex> table = :ets.new(:my_table, [:set, :protected])
```
- `:set` - no duplicate keys (or: `:ordered_set`, `:bag`, `:duplicate_bag`)
- `:protected` - only this process can use it (or: `:public`, `:private`)
### Other functions
```elixir
# Ordered sets
:ets.first(table)
:ets.last(table)
:ets.next(table, key)
:ets.prev(table, key)
```
## References
* <http://erlang.org/doc/man/ets.html>
* <http://learnyousomeerlang.com/ets>