Greg's is a nice and clean solution for the data visualization problem,
assuming you're only going to use partials.
I hacked together a solution to support functions with equality semantics,
if anyone is interested. It doesn't support anonymous functions or
closures, but doing that would requir
Simpler yet using metadata:
(ns example.ppfn)
(defn print-pf [pf]
(if-let [ppf (::ppf (meta pf))] ppf pf))
(defmacro partial* [& args]
`(let [m# (pr-str '(partial* ~@args))
pf# (with-meta (partial ~@args) {::ppf m#})]
(defmethod print-method (class pf#) [o# w#] (print-simple
(
在 2014年4月25日星期五UTC-7下午12时16分22秒，Alex Miller写道：
>
>
> On Friday, April 25, 2014 1:23:49 PM UTC-5, Matthew DeVore wrote:
>>
>> Thanks for pointing out the ticket, but based on the Description, it
>> falls short of what I need. It doesn't have any additional information that
>> I can't deduce from
The code below accounts for partials of the same arity. However, there
might be a better way to do this with clojure.reflect:
(defn print-partial [a-fn]
(let [c (class a-fn)
fields (into {} (->> c .getDeclaredFields
(map #(vector (.getName %)
Got it. The macro, as is, will displace the print method for the same arity.
On Friday, April 25, 2014 2:50:34 PM UTC-7, Gary Trakhman wrote:
>
> Ah, I think I was mistaken in a detail, but generally correct. Try it
> with two partials of the same arity.
>
>
> https://github.com/clojure/clojure/
user> (def a (partial* + 1 2 3))
#'user/a
user> a
(partial + 1 2 3)
user> (def b (partial* + 1 2 5))
#'user/b
user> b
(partial + 1 2 5)
user> a
(partial + 1 2 5)
On Fri, Apr 25, 2014 at 5:51 PM, Greg D wrote:
> I guess I don't understand the problem, or what is meant by "all the
> return c
I guess I don't understand the problem, or what is meant by "all the return
classes of partial are the same class". A counter-example would be helpful.
Further transcript using the macro:
user=> (def p6 (partial* + 1 2 3))
#'user/p6
user=> (class p6)
clojure.core$partial$fn__4194
user=> (def p10
Ah, I think I was mistaken in a detail, but generally correct. Try it with
two partials of the same arity.
https://github.com/clojure/clojure/blob/master/src/clj/clojure/core.clj#L2460
On Fri, Apr 25, 2014 at 5:47 PM, Greg D wrote:
> I guess I don't understand the problem, or what is meant by
I guess I don't understand the problem, or what is meant by "different
classes". A counter-example would be helpful.
Further transcript using the macro:
(def p6 (partial* + 1 2 3))
#'user/p6
user=> (class p6)
clojure.core$partial$fn__4194
user=> (def p10 (partial* + 1 2 3 4))
#'user/p10
user=> (
That's not going to work, all the return classes of partial are the same
class.
On Fri, Apr 25, 2014 at 5:26 PM, Greg D wrote:
> I don't know if this is considered good Clojure, but you could define a
> print-method within a macro to set up the normal string representation for
> the partial fun
I don't know if this is considered good Clojure, but you could define a
print-method within a macro to set up the normal string representation for
the partial function:
(defmacro partial* [fname arg0 & args]
`(let [pf# (partial ~fname ~arg0 ~@args)
cpf# (class pf#)]
(defmethod pr
On Friday, April 25, 2014 1:23:49 PM UTC-5, Matthew DeVore wrote:
>
> Thanks for pointing out the ticket, but based on the Description, it falls
> short of what I need. It doesn't have any additional information that I
> can't deduce from looking at the code, in other words, the value of the
>
Thanks for pointing out the ticket, but based on the Description, it falls
short of what I need. It doesn't have any additional information that I
can't deduce from looking at the code, in other words, the value of the
items in the closures. So while it makes toString prettier, it's not
informa
You might be interested in this ticket
(http://dev.clojure.org/jira/browse/CLJ-1278) of which this is perhaps one
special case.
I don't know that I necessarily would want the equality semantics; at least
in the case of impure functions the equality does not hold.
On Friday, April 25, 2014 11:
Hi,
There has been one thing bugging me for a long time that seems worth it to
fix, and I was wondering if anyone else has had the same problem. I have
enjoyed using Clojure's REPL and embracing a Clojure-style data model for
my app, where everything is a glorified map or vector and there are n
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