I find let? useful and readable, as do others. There's a bit of brain- training necessary to read it, but not a lot. Probably no more than the keyword clauses of the "for" comprehension. The argument that decades of Lisp programmers haven't invented this particular "chucklehead" macro is a bit weak, since there have been many other similar macros.
...and I have learned to love nil, even the :else nil clause that repels you. - Evan On Mar 9, 9:26 am, Craig Brozefsky <cr...@red-bean.com> wrote: > Evan Gamble <solar.f...@gmail.com> writes: > > (let? [a foo :else nil > > b bar :is even? > > c baz :when (> b c) > > d qux] > > (f a b c d)) > > Macros like that just make your code so much LESS readable. I now have > to understand the semantics of a bunch of keywords specific to the > macro, their order of operations within the macro, as well as > recognizing the little ? on the end of the let as I'm scanning. I also > have to see if that's a keyword or the start of another binding! > > :else nil? really? > > :is ... Geezus christ > > :when !?!?! Put down that nailgun, kid > > ;; This maintains the same logic (unless I fucked up transcoding) > ;; and also the same err, complexity, in that forms are not exeuted if > ;; they don't need to be, as your initial example, without nesting all > ;; the way over to the side, or using some weird keyword language. > > (when-let [a foo] > (let [b bar > c (when (even? b) baz)] > (when (and c (> b c)) > (f a b c qux)))) > > ;; or > > (when-let [a foo] > (let [b bar > c (when (even? b) baz) > d (when (and c (> b c)) qux)] > (when d (f a b c d)))) > > Keep your constructs simple, and learn to love the nil. > > Also, people have been writing lisp for a real long time, and they > haven't invented a chucklehead macro like let? yet, so prolly not really > needed to improve the readability... > > -- > Craig Brozefsky <cr...@red-bean.com> > Premature reification is the root of all evil -- 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
