Pipette (pipette v0.4.0)
usage
Usage
Add use Pipette to the start of the module. This will introduce the <~ and ~> operators.
examples
Examples
normal-pipe-operation
Normal pipe operation
iex> %{hello: "world"} ~> Map.get(:hello)
"world"
pipe-into-maps
Pipe into maps
iex> "world" ~> %{hello: &1}
%{hello: "world"}
iex> :hello ~> %{&1 => "world"}
%{hello: "world"}
pipe-into-lists
Pipe into lists
iex> 2 ~> [1, &1, 3]
[1, 2, 3]
iex> 1 ~> [&1 | [2, 3]]
[1, 2, 3]
iex> [2, 3] ~> [1 | &1]
[1, 2, 3]
pipe-into-a-specific-function-parameter-instead-of-the-first
Pipe into a specific function parameter (instead of the first)
iex> %{hello: "world"}
...> ~> Map.get(:hello)
...> ~> Map.put(%{}, :goodbye, &1)
%{goodbye: "world"}
pipe-into-function-definition
Pipe into function definition
iex> %{hello: "world"}
...> ~> Map.get(:hello)
...> ~> fn value -> "hello " <> value end
"hello world"
skip-over-error-tuples
Skip over error tuples
iex> {:error, "Something went wrong"}
...> ~> Map.get(:hello)
...> ~> Map.put(%{}, :goodbye, &1)
{:error, "Something went wrong"}
transform-error-tuples-with
Transform error tuples (with <~)
iex> assert {:error, "Something went wrong"}
...> ~> Tuple.to_list
...> <~ fn error -> error <> ", more information" end
{:error, "Something went wrong, more information"}
iex> {:error, "Something went wrong"}
...> <~ fn _ -> {:ok, "Default value"} end
"Default value"
inspect-both-result-tuples-with-simplified-labels
Inspect both result tuples (with simplified labels)
iex> ExUnit.CaptureIO.capture_io(fn ->
...> {:error, "Something went wrong"}
...> ~> IO.inspect # Without label
...> <~ fn _ -> {:ok, "Default value"} end
...> ~> IO.inspect("ok") # With label
...> end)
"""
{:error, "Something went wrong"}
ok: "Default value"
"""