Lesson 17. Maps, dictionaries, and sets
This lesson should be a fairly easy one as we round off the collection types in F#. So far you’ve looked at collections that model ordered elements of data in some way—sequences, lists, and arrays—that behave similarly to the BCL List or IEnumerable types. You’ll now spend a little time looking at using other collection types in F#:
- Working with the standard Generic dictionary in F#
- Creating an immutable IDictionary
- Using the F#-specific Map type
- Using the F#-specific Set type
17.1. Dictionaries
F# has several dictionaries available to it. Let’s review the main types now.
17.1.1. Mutable dictionaries in F#
You almost certainly already know the System.Collections.Generic.Dictionary type from C# or VB ...
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