destructure v0.1.0 Destructure
Provides helpers for destructuring Elixir data structures. See the d/1
macro
for more information.
Summary
Macros
Easy destructuring of maps and keyword lists, with atom keys only. String keys
are not supported because Elixir raises a SyntaxError
on syntax like
%{"name"}
Macros
Easy destructuring of maps and keyword lists, with atom keys only. String keys
are not supported because Elixir raises a SyntaxError
on syntax like
%{"name"}
.
Examples
The macro can be used in simple match statements:
iex> d(%{name}) = %{name: "Joe"}
...> name
"Joe"
Or in case/for/with statements.
iex> case %{name: "Mike"} do
...> d%{name} ->
...> name
...> end
"Mike"
It can be used inside a complex match:
iex> %{body: d%{name}} = %{body: %{name: "Robert"}}
...> name
"Robert"
With multiple keys:
iex> d(%{first, last}) = %{first: "Daniel", last: "Berkompas"}
...> {first, last}
{"Daniel", "Berkompas"}
For keyword lists:
iex> d({name}) = [name: "Daniel"]
...> name
"Daniel"
With multiple keys:
iex> d({first, last}) = [first: "Daniel", last: "Berkompas"]
...> {first, last}
{"Daniel", "Berkompas"}
And in function definitions:
iex> defmodule Test do
...> import Destructure
...> def test(d%{name}) do
...> name
...> end
...> end
...> Test.test(%{name: "Daniel"})
"Daniel"