hello, just trying transducers before using it, i try to understand. what is wrong with that: scheme@(guile-user)> (list-transduce (tfilter (λ (x) x)) (tdelete-duplicates) (list 1 2 #f 3 3 4)) ice-9/boot-9.scm:1685:16: In procedure raise-exception: Wrong number of arguments to #<procedure 10786aa60 at srfi/srfi-171.scm:338:2 (reducer)>
Entering a new prompt. Type `,bt' for a backtrace or `,q' to continue. Regards, Damien On Wed, Dec 21, 2022 at 11:01 AM Linus Björnstam < linus.bjorns...@veryfast.biz> wrote: > As the author of both the SRFI and the guile code I am very happy you like > it. I don't have a computer at the moment, but I looked through the code > and it looked great. > > All additions should have been included in the original SRFI :) > > one comment: your code uses define-public, which the rest of SRFI-171 code > does not. > > I am not in any position to sign code off for inclusion in guile proper, > but if the define-public thing is fixed it very much has my blessing. > > Best regards > Linus Björnstam > > On Wed, 21 Dec 2022, at 01:48, Colin Woodbury wrote: > > Happy holidays everyone, I hope everything is going well for you. > > > > Since discovering SRFI-171 (Transducers) I have fallen in love with it. > > Transducers let me "talk the way I want to talk" while knowing that I'm > > being efficient underneath w.r.t. to iteration and allocation. In using > > Guile's implementation, I noticed a few common idioms missing that are > > otherwise present in other languages, so I've added them in a series of > > patches. I've been using these often for a number of weeks without > > issue, but of course have added unit tests as well. > > > > The full details are in the commit messages, but here are the main > highlights: > > > > * rfold: The fundamental reducer. This allows the user to turn any > > two-arg function into a valid reducer, so that they don't need to worry > > about hand-writing reducers via case-lambda. > > * rfind: Yields the first item in the transduction that matches some > > predicate. Nice for locating some specific value from a potentially > > large data source (e.g. a port). > > * twindow: Like tsegment, but yields overlapping slices into the data. > > Cheers, and have a great holiday. > > > > Colin > > > > Attachments: > > * 0001-srfi-171-add-twindow-and-various-reducers.patch > > * 0002-doc-add-new-SRFI-171-reducers-to-the-manual.patch > > * 0003-srfi-171-add-unit-tests-for-new-functions.patch > >
