On Thu, Jan 19, 2017 at 11:12 AM, François Laupretre <flaupre...@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 `|>`.
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