Named parameters: Difference between revisions

=={{header|Clojure}}==

Clojure doesn't have built-in support for named or keyword arguments, but you can use destructuring to achieve a similar effect.

<lang lisp>(defn foo [& opts]

(let [opts (merge {:bar 1 :baz 2} (apply hash-map opts))

{:keys [bar baz]} opts]

[bar baz]))</lang>

You can also use <code>defnk</code> from <code>clojure.contrib.def</code>, which is a macro that works similarly.

<lang lisp>(use 'clojure.contrib.def)

(defnk foo [:bar 1 :baz 2]

[bar baz])</lang>

Sample output for both:

<pre>user> (foo :baz 123)

[1 123]

user> (foo :bar 456)

[456 2]</pre>