July 2023
Intermediate to advanced
276 pages
6h 55m
English
Content preview from Functional Programming in Java, 2nd EditionBecome 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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Speeding Up with Memoization
Quick, what’s 25 * 12?
Unless you have some superpowers, you’ll take some effort and time to arrive at the result of 300. Now, if I ask again what’s 25 * 12, right away, you’ll instantaneously snap back the response of 300. How did you get that good so fast? Well, you remembered the result, temporarily memorized it—or should we say you memoized it.
If you evaluated an expression or looked up some information recently, and if you need that again, you most likely use the details from your memory instead of repeating the task. But computers can do that kind of stuff a lot more efficiently than we can. Reusing the result of a computation, instead of repeating its evaluation, is a technique called memoization.
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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.
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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.