June 2014
Intermediate to advanced
300 pages
7h 12m
English
Content preview from Seven Concurrency Models in Seven WeeksBecome 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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Day 2: Functional Parallelism
Today we’ll continue our discussion of how functional programming helps with parallelism by looking at fold in more detail. But before we do that, we’ll look at parallelizing our Wikipedia word count.
One Page at a Time
In day 1 we saw that the map function creates a sequence by applying a function to each element of an input sequence in turn. But there’s no reason this has to happen serially—Clojure’s pmap function operates just like map, except that the function is applied in parallel. It’s semi-lazy, in that the parallel computation stays ahead of the consumption, but it won’t realize the entire result unless required.
We could, for example, convert our sequence of Wikipedia pages to a sequence of maps of ...
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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.