August 2015
Intermediate to advanced
220 pages
5h 53m
English
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Accessing Collections
The purpose of our collections is to store our data, but they’re only useful if we can get the data back out of the collection. Let’s first consider the collections that support indexed lookup by a key.
Indexed Access
Maps and vectors are the two indexed collections provided in Clojure. Vectors use 0-based indexes and are treated as associative collections from index to element. The records that we saw while modeling our domain also implement the map interfaces and can be treated as indexed collections.
Indexed collections support lookup by three methods. The first is by invoking the get function with the collection and a key. The second is by invoking the collection itself with a key. The third is by invoking a keyword ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.