May 2018
Beginner to intermediate
290 pages
6h 43m
English
Content preview from Getting ClojureBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Spec’ing Maps (Again)
That brings us back to writing specs for maps. Recall that we passed over the strangeness that while the keywords in our actual book maps were sans namespaces (:title, for example), in the spec we used keywords with a namespace (:inventory.core/title, for example).
The reason for this is both clever and useful, two things that don’t always go together. When you specify the keys to a map, clojure.spec will try to look up the (fully qualified) keys in the registry. If it doesn’t find a spec registered under that key, no problem. But if it does, it validates the value associated with that key in the map against the spec.
Since up to now we haven’t registered specs under :inventory.core/title, :inventory. core/author, or
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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