Phylax

Phylax

Web Development with Clojure, Third Edition: Omitted `var` (page 38)

After the introduction of of muuntaja the -main function changes from

(defn -main []
(jetty/run-jetty
(-> handler
var
wrap-nocache
wrap-reload)
{:port 3000
:join? false}))

to

(defn -main []
(jetty/run-jetty
(-> #'handler
wrap-nocache
wrap-formats
wrap-reload)
{:port 3000
:join? false}))

The handler is no longer turned into a var which defeats the purpose of wrap-reload (which is still present). Possibly a slip worth being corrected.

Thanks for this great book!

Marked As Solved

svmbrown

svmbrown

Author of Web Development with Clojure

Hi, we replace (-> handler var ...) with (-> #'handler ...). This does the exact same thing, but uses the #' syntax sugar instead of calling var explicitly. We’ve added an explanation of this syntax to clarify.

Hope this helps!

Also Liked

Dmitri

Dmitri

Author of Web Development with Clojure

Good catch, thanks! we’ll update in the next release.

Phylax

Phylax

You’re quick, thanks. JFYI: As I’m working through the book I’ve found the same omission on p. 42, so maybe there’s more. Cheers!

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