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The Definitive Guide to Power Query (M)

You're reading from  The Definitive Guide to Power Query (M)

Product type Book
Published in Mar 2024
Publisher Packt
ISBN-13 9781835089729
Pages 758 pages
Edition 1st Edition
Languages
Authors (3):
Gregory Deckler Gregory Deckler
Profile icon Gregory Deckler
Rick de Groot Rick de Groot
Profile icon Rick de Groot
Melissa de Korte Melissa de Korte
Profile icon Melissa de Korte
View More author details

Table of Contents (19) Chapters

Preface Introducing M Working with Power Query/M Accessing and Combining Data Understanding Values and Expressions Understanding Data Types Structured Values Conceptualizing M Working with Nested Structures Parameters and Custom Functions Dealing with Dates, Times, and Durations Comparers, Replacers, Combiners, and Splitters Handling Errors and Debugging Iteration and Recursion Troublesome Data Patterns Optimizing Performance Enabling Extensions Other Books You May Enjoy
Index

Strategies for debugging

Debugging is an integral part of the development process, and encountering situations where the code behaves unexpectedly is inevitable. Effective debugging strategies play a crucial role in identifying and rectifying errors while also enhancing code comprehension. General best practices for debugging M code include the use of comments, renaming steps for readability, breaking down complex expressions, and testing.

Let’s look at them in greater detail:

  • Comments are not just placeholders for thoughts or code descriptions; they serve as critical pointers that guide the debugging process. They can help you and others understand the purpose and functionality of different code sections, making it easier to locate and fix issues. Moreover, comments can be used to mark areas of code that require further review or are prone to errors.
  • By default, Power Query assigns generic names to each step. These names don’t provide much insight...
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