课程: Programming Foundations: Design Patterns

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Solution: The Iterator pattern

Solution: The Iterator pattern

课程: Programming Foundations: Design Patterns

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Solution: The Iterator pattern

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(upbeat music) - [Narrator] For our challenge solution, we chose the Swift programming language. And Swift aggregate objects, like arrays and sets and dictionaries, are all sequences, and they all provide built-in iterators. You can use the for in statement, like we're doing here in the short example, that iterates over an array of animals. Or you can use the underlying iterator supplied by the sequence and use that iterator's interface to iterate. However, most of the time, you'll just use the for in statement.

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