How to use a Scala 'for' loop with embedded 'if' statements (guards)

This is an excerpt from the Scala Cookbook (partially modified for the internet). This is Recipe 3.3, “How to use a 'for' loop with embedded 'if' statements (guards).”

Problem

You want to add one or more conditional clauses to a for loop, typically to filter out some elements in a collection while working on the others.

Solution

Add an if statement after your generator, like this:

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