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Comprehensive Ruby Programming

You're reading from   Comprehensive Ruby Programming From beginner to confident programmer

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Product type Paperback
Published in Jun 2017
Publisher Packt
ISBN-13 9781787280649
Length 330 pages
Edition 1st Edition
Languages
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Author (1):
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Jordan Hudgens Jordan Hudgens
Author Profile Icon Jordan Hudgens
Jordan Hudgens
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Toc

Table of Contents (20) Chapters Close

Preface 1. Introduction to the Ruby Programming Language 2. Ruby Variables FREE CHAPTER 3. Ruby Strings 4. Working with Numbers in Ruby 5. Ruby Methods 6. Ruby Iterators and Loops 7. Ruby Collections 8. Ruby Conditionals 9. Object-Oriented Programming in Ruby 10. Working with the Filesystem in Ruby 11. Error Handling in Ruby 12. Regular Expressions in Ruby 13. Searching with grep in Ruby 14. Ruby Gems 15. Ruby Metaprogramming 16. Ruby Web Frameworks 17. Working with APIs in Ruby 18. Ruby Algorithms 19. Machine Learning

Implementing the quick sort algorithm

Quick sort is one of the most popular sorting algorithms (see the Introduction to sorting algorithms section) to implement, and it is also considered the most efficient in many cases.

Explanation of quick sort

The following visual shows you a high-level view of quick sort:

In this example, the algorithm chooses a pivot value, which in this case is 4. From there, it splits the collection into two groups: one with elements to the left of 4 and the other to the right of 4. Next, quick sort is recursively called on the newly formed left and right collections. For example, the group lower than 4 is chosen next and another pivot point for this subgroup is identified. Based on this pivot point...

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