May 2017
Intermediate to advanced
340 pages
8h 16m
English
Content preview from PHP 7 Data Structures and Algorithms
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Depth first search
Depth first search, or DFS, is a search technique where we start searching from a node and go as deep as possible to the node from the target node through the branches. DFS is different from BFS, and we try to dig deeper instead of spreading out first. DFS grows vertically and backtracks when it reaches the end of the branch and moves the next available adjacent nodes until the search is over. We can take the same tree image from the last section, which is shown as follows:
If we apply DFS here, the traversal will be 
. We ...
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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.