On 30/08/2014 15:07, Alexey Kachayev wrote:
for macro expects each pair to be either binding-form/collection-expr or
one of known modifiers (:let, :when, :while).
Here:
plan (keyword (first l))
you give a pair of binding-form and keyword (which is really impossible
to iterate over).
If you meant let-binding for plan, dec, min and long, use :let modifier
(you can find example in documentation -
http://clojuredocs.org/clojure_core/clojure.core/for).
I'm going to have to reduce the resulting list next so I thought to use
a map version of the list comp. but ran into a similar error:
(defn calc .......
(let [ .....
.......
list-of-lists (map #(rest (first %)) results)]
(-> list-of-lists
(map #(let [plan (keyword (first %))
deg (Integer/parseInt (second %))
sign (signs (keyword (first (rest (rest %)))))
min (Integer/parseInt (second (rest (rest %))))
long (Float/parseFloat (last %))]
{plan {:sign sign :deg deg :min min :long long}})))
"Don't know how to create ISeq from: astro.calc$calc$fn__29869"
Now I'm using a let form but the error is similar.
gvim
2014-08-30 16:47 GMT+03:00 gvim <gvi...@gmail.com
<mailto:gvi...@gmail.com>>:
I have a long function which produces `list-of-lists` :
(("Sun" "21" "li" "13" "201.2139410 <tel:201.2139410>")
("Moon" "11" "le" "21" "131.3457459")
......)
.... before entering a list comprehension (simplified for brevity):
(defn calc .......
(let [ .....
.......
list-of-lists (map #(rest (first %)) results)]
(for [l list-of-lists
plan (keyword (first l))
deg (Integer/parseInt (second l))
sign (signs (keyword (first (rest (rest l)))))
min (Integer/parseInt (second (rest (rest l))))
long (Float/parseFloat (last l))]
{:deg deg :min min :long long})))
When I call the function I get this error:
IllegalArgumentException Don't know how to create ISeq from:
clojure.lang.Keyword clojure.lang.RT.seqFrom (RT.java:505)
I've tested all the bindings in the repl and they produce the
desired data so it seems the final construction of the map is where
the problem lies.
gvim
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