Aw: Creating a Clojure Record from a string
Hi, maybe you just want a factory? (defrecord Foo [a b]) (defn make-Foo [a b] (Foo. a b)) (defn make [^String class args] (let [last-dot (.lastIndexOf class \.) factory (ns-resolve (symbol (subs class 0 last-dot)) (symbol (str make- (subs class (inc last-dot)] (when factory (apply factory args))) Something like that? Sincerely Meikel -- 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
Creating a Clojure Record from a string
Given:
test=(defrecord Foo [A B])
test=(class (Foo. 1 2))
test.Foo
How do I:
test=(new test.Foo 1 2)
#:test.Foo{:A 1, :B 2}
Currently I get Unable to resolve classname: test/Foo.
Thanks,
Timothy
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that–lacking zero–they had no way to indicate successful termination
of their C programs.”
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Re: Creating a Clojure Record from a string
Given:
test=(defrecord Foo [A B])
test=(class (Foo. 1 2))
test.Foo
How do I:
test=(new test.Foo 1 2)
#:test.Foo{:A 1, :B 2}
Currently I get Unable to resolve classname: test/Foo.
Thanks,
Timothy
(Class/forName java.lang.String)
Be mindful of the performance...
Stu
Stuart Halloway
Clojure/core
http://clojure.com
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Re: Creating a Clojure Record from a string
Given:
test=(defrecord Foo [A B])
test=(class (Foo. 1 2))
test.Foo
How do I:
test=(new test.Foo 1 2)
#:test.Foo{:A 1, :B 2}
Currently I get Unable to resolve classname: test/Foo.
Check out
http://stackoverflow.com/questions/3748559/clojure-creating-new-instance-from-string-class-name.
Be sure to scroll down to see all the replies, since the macro one is
(IMO) the easiest to understand, although it has limitations.
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Re: Creating a Clojure Record from a string
(Class/forName java.lang.String) Oh, does that work in 1.3? Because (new (Class/forName user.Foo)) was the first thing I tried (under 1.2) and it doesn't work. Perhaps unsurprisingly given that new is a special form. -- 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
Re: Creating a Clojure Record from a string
On Aug 23, 3:39 pm, Craig Andera cand...@wangdera.com wrote: (Class/forName java.lang.String) Oh, does that work in 1.3? Because (new (Class/forName user.Foo)) was the first thing I tried (under 1.2) and it doesn't work. Perhaps unsurprisingly given that new is a special form. No. But you can use reflection to futz around with the class object, find its constructor, and then invoke that. -- 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
Re: Creating a Clojure Record from a string
test= (def foo-class-symbol (load-string test.Foo))
test= (def foo (eval (list 'new foo-class-symbol 1 2)))
test= foo
#:test.Foo{:A 1, :B 2}
Is that what you want?
On Aug 23, 6:24 pm, Timothy Baldridge tbaldri...@gmail.com wrote:
Given:
test=(defrecord Foo [A B])
test=(class (Foo. 1 2))
test.Foo
How do I:
test=(new test.Foo 1 2)
#:test.Foo{:A 1, :B 2}
Currently I get Unable to resolve classname: test/Foo.
Thanks,
Timothy
--
“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)
--
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