August 2017
Intermediate to advanced
222 pages
5h 3m
English
Content preview from A Common-Sense Guide to Data Structures and AlgorithmsBecome 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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Chapter 12Speeding Up All the Things with Binary Trees
In Chapter 2, Why Algorithms Matter, we covered the concept of binary search, and demonstrated that if we have an ordered array, we can use binary search to locate any value in O(log N) time. Thus, ordered arrays are awesome.
However, there is a problem with ordered arrays.
When it comes to insertions and deletions, ordered arrays are slow. Whenever a value is inserted into an ordered array, we first shift all items greater than that value one cell to the right. And when a value is deleted from an ordered array, we shift all greater values one cell to the left. This takes N steps in a worst-case scenario (inserting into or deleting from the first value of the array), and N / 2 steps on ...
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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.