The interesting case of the swift switch case and pattern matching

Swift switch cases are interesting and that’s for many reasons.

First if you were an Obj-C developer, The power of being able to use switch cases on strings and any type other than integer would be interesting enough.

This is a very normal straight forward switch case identifying it’s master using string names.

But it does not end here, It gets even more interesting with swift’s pattern matching.

Enter Pattern Matching, Things become more interesting.

Now what if the switch case mastery was a joined rule, If that’s the case I can’t alone claim the title, My partner must be there too to flip the dual keys together.

To handle this we can match against a tuple.

Here we are matching a tuple with two names, But what if that partnership was a bit more relax and you can go with whoever you want as long as at least one of you exists?

You can always neglect a value from the tuple and only check one name.

In some cases you might not care about matching one part of the tuple, Yet you still need to know its value.

In this case you use ‘let’ before that part of the tuple.

Switch cases with pattern matching can be and is used in many scenarios and you’ll find it in the heart of many popularly used open source libraries, You’ll find it inside Moya to name one.

Name open source code with switch cases and pattern matching in the comments, Also if you have any other scenarios please mention it and I will gladly update the article and add it.

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