Elixir IEX multi-line command
A change on Elixir 1.12.0 made possible to pipe |> multi-line commands in iex where the |> operator is in the beginning of new lines.
That means that we can:
iex(1)> :foo
:foo
iex(2)> |> to_string()
"foo"
iex(3)> |> String.upcase()
"FOO"
The docs also mention that all other binary operators works the same way, except +/2 and -/2, so that's also valid:
iex(1)> [:foo]
[:foo]
iex(2)> ++ [:bar]
[:foo, :bar]
iex(3)> |> Enum.join(" ")
"foo bar"
iex(4)> |> String.upcase()
"FOO BAR"Each line will run at a new command, so if you assign a variable in the first line you may not have what you expect, so watch out.
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