PipeAssign - Keep the Pipe, Capture the Value

Bookmarked for the very next time I need it

Thanks!

You could achieve the same result and readability by using the with clause in my opinion:

with step1 <- transform(data),
     step2 <- process(step1),
     result <- finalize(step2) do
  # do something with variables
end

Yes. But I love pipes

Pipe-ists gonna pipe

I look forward to trying this out.

How would you compare and contrast this library’s aims and functionality with the ok library?

ok is a syntactically shorter with and then alternative. It’s not suitable to assign to variable in pipe flow.

pipe_assign is an alternative for an equal sign but not before pipe flow, but after. It’s suitable to assign to variable in pipe flow.

I wonder what compile warnings you were referring to. The last time I checked, this works:

  defmacro bind_to(value, name) do
    quote do
      unquote(name) = unquote(value)
    end
  end

result = 0

[1, 2, 3]
|> Enum.map(&(&1 * 2))
|> Enum.sum()
|> bind_to(result)

warning: variable “result” is unused

If you are not going to use the old result why initialize it? If you are not going to use the new result why bind to it? IMHO this warning is useful.

Now when I think about it… you’re right! =)
I’ll change the behavior.
Thank you.