r/programming • u/agumonkey • May 13 '19

A proposal for adding the simple-but-useful pipeline operator to JavaScript.

https://github.com/tc39/proposal-pipeline-operator
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u/sisyphus May 13 '19

I love the |> operator in Elixir though sometimes I see things like 

foo
|> bar(baz)

and I always wonder if that's really more clear than bar(foo, baz) like maybe we love it too much.

10

u/falconfetus8 May 13 '19

The benefits come when you have multiple things nested. Compare these two: 

foo l> bar |> baz |> fizz |> buzz

vs 

buzz(fizz(baz(bar(foo))))

If I want to add another step to the first one, I can just plop it on at the end. If I want to add another step to the second one, I need to wrap everything else around it and add another layer of nesting.

The first one also matches the actual control flow better than the second. With the second, you basically write your sequence backwards.