On Fri, Feb 7, 2025, at 10:51 AM, Christoph M. Becker wrote: >> Of particular note, since the last RFC I have concluded that a compose >> operator is a necessary complement to a pipe operator. However, it's also >> going to be notably more work, and the two operators don't actually interact >> at all at the code level, so since people keep saying "Small RFCs!", here's >> a small RFC. :-) > > Fair enough. And with the pipe operator, one might live without a > compose operator, e.g. > > $f1 = fn($x) => 2 * $x; > $f2 = fn($x) => $x + 3; > // $f3 = $f2 ∘ $f1 > $f3 = fn($x) => $x |> $f1 |> $f2; > > Christoph
The v2 RFC took that position, that compose was easy enough to emulate via pipe. Indeed, pipe and compose can both be implemented in terms of each other. However, since the previous RFC I've concluded[1] that both are sufficiently useful that we really out to include both of them. PIpes are just way easier to implement in practice. :-) --Larry Garfield [1] https://peakd.com/hive-168588/@crell/aoc2021-review
