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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

Working with lists

Considering the numerous functions designed to work with lists, their significance is evident. You can think of lists containing primitive values as similar to one-dimensional arrays: a flexible structure that allows for the easy storage and manipulation of data, including adding, removing, and modifying items. This section focuses solely on working with lists; lists that contain other value types, like records or tables, are covered later on in this chapter.

Transforming a list

Every element within a list can be referred to by its positional index – a number that reflects its zero-based position within a list. The first element has a positional index of 0, followed by the second element with an index of 1, and so on. A method called item access provides access to each list element by using this zero-based index position within a set of curly brackets, { }.

List.Transform

List.Transform provides a wealth of possibilities. Much like the name...

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