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clojure resolving function from string name

Tags:

clojure

eval

In clojure 1.2RC1, I wish to obtain a function based on its name as string and evaluate it.

Function definition

(ns my-ns)

(defn mycar [x] (first x))

The following worked:

((ns-resolve *ns* (symbol "mycar")) '(3 4))
((intern *ns* (symbol "mycar")) '(3 4))
((eval (symbol "mycar")) '(3  4))

but they seem ugly. Is there a better way? If not, which of the above is the most idiomatic?

like image 742
chris Avatar asked Aug 04 '10 17:08

chris


1 Answers

This worked for me without using eval:

user> (defn mycar [x] (first x))
#'user/mycar
user> ((resolve (symbol "mycar")) [1 2 3])
1

This works because resolves finds the mycar var in the current namespace and the var calls the function it's bound to. This is a shorter version of your first example. I'd use it just so that I could avoid using eval.

like image 86
Rayne Avatar answered Oct 20 '22 15:10

Rayne