Re: Pipe Operator v2

On Thu, Jan 19, 2017 at 11:12 AM, François Laupretre <flaupretre@free.fr> wrote: > Le 19/01/2017 à 13:54, Levi Morrison a écrit : >> >> The |> symbol would be the piping operator with these >> semantics: >> 1. Evaluate the left-hand side. >> 2. Evaluate the right-hand side. Assert that the result is callable.. >> 3. Pass the result from 1. as the single argument to 2. > > > May I suggest extending your 3rd rule to : when the right hand side has the > form of a function call, insert the result from 1. as first argument of 2.. > This way, right hand side may specify additional arguments If we only had |> this may be good but since we are also proposing $$ then this renders your suggestion unnecessary: $string |> trim($$) Would work just fine with no performance overhead. Additionally, you could write: $input |> array_map($fn, $$) Or: $input |> array_filter($$, $fn) Basically, $$ gives the flexibility of passing additional arguments and keeps |> simple. No need for additional rules for |>.