On Mar 5, 2017 1:04 PM, "Timothy Baldridge" <tbaldri...@gmail.com> wrote:
>> Specter is not a DSL. Specter implements a set of terms (navigators) specific to the library that are interpreted by the library (the transform function) to accomplish some task for a specific domain (manipulating data structures). In the same way, `update-in` is a DSL. Both Specter and `update-in` support certain operators and have certain behaviors under difference occasions. Specter may compile down to composed functions, or Clojure code, while `update-in` is always interpreted, but the net effect is still the same. They both are languages specific to a certain domain. sure, but so is + and every other operator; every op is specific to a computational domain (e.g. arithmetic). to me DSL means specific to an application domain. since Specter is not tied to any such domain, i think it's fair for Nathan to claim it is not a DSL. on the other hand, its vocabulary is quite idiosyncratic, imo. gregg There's noting inherently wrong with using a DSL, they have their places. The value of the DSL will different for each project and programmer. In some cases the added cognitive overhead of learning the caveats of a new DSL may be worth it when compared to the simplification the DSL offers. Other times not so much, depends on the context. Timothy On Sun, Mar 5, 2017 at 7:14 AM, Nathan Marz <nathan.m...@gmail.com> wrote: > To answer a few comments/misconceptions on this thread: > > - Specter is not a DSL. Things like ALL and MAP-VALS are first class > objects that implement the underlying navigator interface. Specter's core > is a high-performance method of composing implementations of that > interface. It makes zero assumptions about what kinds of data it will be > used for. I think any DSL for this problem would ultimately either not be > generic enough or would be overly complex. > - If you want to use a number as a navigator, then extend the ImplicitNav > protocol on numbers and return (nthpath this). > - Zippers are an advanced form of navigation, and Specter integrates them > fully in the com.rpl.specter.zipper namespace. However, zippers add > significant overhead and indirection, and 99.9% of the time you don't need > them (but they do have the occasional use). > - I wrote at length about why I think Specter fills a major hole in > Clojure: http://nathanmarz.com/blog/clojures-missing-piece.html > > > On Saturday, March 4, 2017 at 9:55:49 PM UTC-5, Herwig Hochleitner wrote: >> >> 2017-03-05 0:25 GMT+01:00 Didier <did...@gmail.com>: >> > I'm not too sure what the contribs are. Are they simply packages >> maintained >> > by the Clojure team itself, or are they actually part of the standard >> > library? >> >> As I understand it, they aren't any more sanctioned than any >> third-party library, but the goal is to provide a stock of clojure >> libraries under the same license as clojure itself. Also they provide >> a common CI and path into maven central. >> >> 2017-03-04 22:52 GMT+01:00 Gregg Reynolds <d...@mobileink.com>: >> > it's easy to imagine a more xsl-like (or even css-like) syntax with the >> same >> > functionality >> >> I don't know how it squares up against specter in terms of >> performance, but I've always been fond of the selector-engine in >> enlive, from an engineering elegance POV, as an interface for tree >> query and update. >> It utilizes zippers, but only ever does a single pass (save for some >> weird selectors). Can specter substantially improve on zippers for >> this workload? >> Is there an underlying abstraction, that could sit next to clojure.zip >> or clojure.data.zip? >> > -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with > your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en > --- > You received this message because you are subscribed to the Google Groups > "Clojure" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to clojure+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- “One of the main causes of the fall of the Roman Empire was that–lacking zero–they had no way to indicate successful termination of their C programs.” (Robert Firth) -- You received this message because you are subscribed to the Google Groups "Clojure" group. 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