March 2017
Intermediate to advanced
821 pages
18h 21m
English
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Memoization
Not to be confused with memorization, memoization is a specific term for retaining a number of previously calculated values from a function.
As we saw earlier, side-effect-free functions can be called multiple times without causing problems. The corollary to this is that a function can also be called fewer times than needed. Consider an expensive function which does some complex or, at least, time-consuming math. We know that the result of the function is entirely predicated on the inputs to the function. So the same inputs will always produce the same outputs. Why, then, would we need to call the function multiple times? If we saved the output of the function, we could retrieve that instead of redoing the time-consuming math.
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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.