Mastering Swift 2 Programming (Video 16)

The video tutorial explores the use of the reduce function in Swift, explaining its parameters and how it combines elements in a collection into a single value. It demonstrates reduce in action with an array of integers and shows advanced usage by chaining it with map and using the plus operator. The tutorial also covers real-world applications, such as calculating total and average pay for employees using map and reduce. The video concludes with a summary and introduces the next topic of generators and sequences.

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