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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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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

Error handling – the best practices

Though the previous guide walked through basic error handling that works in practice, there is always room for improvement. In this guide, you are going to learn better error handling techniques in Ruby.

Sometimes, we may not want to rescue every error because we may actually be doing something wrong, such as entering bad data into the database. In such cases, we are better off rescuing only specific errors. For example, let's say you want 8/0 to proceed, but only want it to be logged, so the system knows something like this happened.

To catch the error properly let's include our begin and rescue blocks, but this time, specify the error that needs to be rescued:

begin 
puts 8/0
rescue ZeroDivisionError => e
puts "Error occurred: #{e}"
end

In this code, we are moving the description associated with ZeroDivisionError...

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