29 Working with List: Properties
After reading this lesson, you will be able to
- Inquire over the size of a list
- Check if a sequence contains a specific item
- Count the number of elements that respect a given predicate
In the previous lesson, you learned how to use the map and flatMap functions over an instance of List. These are two of its fundamental operations: when combined with pattern matching, they allow you to define the vast majority of operations you can perform for a sequence. However, implementing the same procedures over and over may not be performant and may be challenging to maintain. For these reasons, the class List provides you with many ready-to-use and performant functions for common transformations and queries. In this ...
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