3 ms·
> the 'with' construct allows a list of conditional patterns and then a general 'do' block, whereas the Erlang 'maybe' allows mixed types of expressions that ca
by _randyr 4y ago
> the 'with' construct allows a list of conditional patterns and then a general 'do' block, whereas the Erlang 'maybe' allows mixed types of expressions that can either be conditional patterns or any normal expression weaved in together at the top level.
This seems slightly incorrect to me. You can write expressions in Elixir's with macro too, by simply swapping the arrow for an equals sign. For example, this is perfectly valid Elixir code:
with {:ok, x} <- {:ok, "Example"},
IO.puts(x),
len = String.length(x) do
IO.puts(len)
end
Did you mean something else?
- mononcqc 4y agoSee https://news.ycombinator.com/item?id=31425298 https://news.ycombinator.com/item?id=31425298 for a response, since this is a duplicate. TL:DR; I had never seen it and had no idea it was possible because I don't recall seeing any documentation or post ever mentioning it! Ignorance on my part.