September 2017
Intermediate to advanced
240 pages
5h 57m
English
Content preview from Learn More Python 3 the Hard Way: The Next Step for New Python ProgrammersBecome 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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Exercise 22. Suffix Arrays
I’d like to tell you a story about suffix arrays. I was interviewing at a company in Seattle during a time I was curious about how to most efficiently create a diff on an executable binary. My research brought me to the algorithms suffix array and suffix tree. The suffix array is simply where you sort all the suffixes of a string into a sorted list. The suffix tree is similar but done more like a BSTree than a list. These algorithms were fairly simple and had fast performance once you did the sorting operation. The problem they solved was finding the longest common substring between two strings (or in this case, lists of bytes).
You can make a suffix array in Python really easily:
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