January 2014
Intermediate to advanced
232 pages
5h 11m
English
Content preview from Web Development with Clojure
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Namespaces
When writing real-world applications we need the tools to organize our code into logical groups. In object-oriented languages it’s common to use classes and define methods as members of a class. In Clojure, we group our functions into namespaces instead. Let’s look at how a namespace is defined.
| | (ns myns) |
| | |
| | (defn print-message [message] |
| | (println "message:" message)) |
| | |
| | (defn say-hello [user] |
| | (print-message (str "hello " user)) |
Here we have a namespace called myns containing two functions, print-message and say-hello. The functions in the same namespace can call each other directly. However, if we wanted to call these functions from a different namespace we would have to reference the myns first in the declaration ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.