The code below works find but there are some things about it that I don’t understand. The only other language I know is Ruby and the order of execution is top to bottom so I’m confused by the ordering on lines 5 and 6. Also, what purpose does ‘names’ serve on the fourth line. defmodule Greeter do …

That names is your argument that gets passed on as a first argument to the next operation. Elixir is all about transformation and we use those pipelines |> for better readability and it’s an elixir idiom. So those lines (4 to 6) could be rewritten as: hello(country, (Enum.join(names, ", ")))

Thank you. That makes sense to me. I have only been studying Elixir for less than 2 weeks so I have a ways to go. Again, thanks.

6 months into Elixir and I find it very hard to go back to Ruby, without its pipeline operator. I found Dave Thomas’ book particularly stressed the pjpeline and how it forms your thinking very well. That is, the syntax isn’t mere sugar, it changes the way you think about transformations of data. M …

I wonder how hard would it be to port the pipeline operator to Ruby. :wink:

[image] mdrozdziel: I wonder how hard would it be to port the pipeline operator to Ruby. :wink: There are at least least two approaches: This one uses the pipe | operator. And Chainable Methods which creates a proxy object that emulates the pipe. To be quite honest, both approaches feel to…

[image] For the people who miss a pipeline in Ruby General Prog (Archived) For the people who miss the Elixir pipeline in Ruby, I made the following: class Fixnum alias bitshift_right >> def >>(b) if b.respond_to?(:call) b.(self) else bitshift_righ…

Since a Prof of mine explained the difference between OOP and imperative programming briefly as “the difference is the position of the first parameter”. Having this in mind, one can think of the . as an alternative of elixirs pipe. Also paradigms in OOP aren’t about transforming immutable data, bu…

@msimcoe - the pipe operator certainly allows for a really nice, straightforward way to model simple chains of function calls, but it’s good to be aware that there are better options if your needs are more complex :slight_smile: Strictly speaking, using pipes, you could of course handle things like…

[image] jwarlander: Strictly speaking, using pipes, you could of course handle things like a simple :ok results etc (that @NobbZ mentioned above) by crafting your functions to handle the outputs from earlier in the pipeline: Yeah, you can handle that :ok which you get in any case from my desc…

Question re default arguments in multiple matching functions

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Qqwy June 30, 2016, 5:16am 7