They are lazy -- change "for" to "doseq"....
________________________________________
From: clojure@googlegroups.com [clojure@googlegroups.com] on behalf of Kevin
Kleinfelter [kleinfelter.gro...@gmail.com]
Sent: 17 May 2017 19:14
To: Clojure
Subject: Let and For Doesn't Execute - Where Is My Misunderstanding?
I'm stumped by the behavior of the following code fragment. Can someone help
me understand what's happening?
This code:
(println "Holding:" (:class holding))
(let [t (:class holding)]
(for [x t] (println "here" x))
(for [x t] (println "there" x))))
Produces this output:
holding: {:fundname Mutual Fund 1, :value 123.45, :class [{:class sell-me,
:percent 100}]}
class: [{:class sell-me, :percent 100}]
Holding: [{:class sell-me, :percent 100}]
there {:class sell-me, :percent 100}
Why doesn't the 'for' with "here" print anything?
I tried wrapping the fors with a do, but the output was the same:
(println "class:" (:class holding))
(let [t (:class holding)]
(do
(for [x t] (println "here" x))
(for [x t] (println "there" x)))))
Thanks!
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