June 2024
Intermediate to advanced
488 pages
9h 29m
English
Content preview from Algorithms and Data Structures with PythonBecome 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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Practical Exercises for Chapter 9
The following exercises offer practical applications of the concepts discussed in Chapter 9. They provide hands-on experience with string algorithms and text analysis techniques, reinforcing understanding and demonstrating the utility of these methods in real-world scenarios.
Exercise 1: Implement the Boyer-Moore Algorithm for Pattern Searching
- Objective: Write a function to perform the Boyer-Moore string search algorithm, an efficient method for finding substrings in larger text strings.
- Note: The Boyer-Moore algorithm is complex, focusing on the "bad character" heuristic.
Solution:
def boyer_moore_search(text, pattern):
def bad_char_heuristic(pattern):
bad_char = [-1] * 256
for i in range(len(pattern)):
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