Transforming and Combining Streams

In Combine, a publisher emits a stream of values over time. The real power comes from operators that transform and combine these streams into new ones.

This lesson covers the most important transforming and combining operators: flatMap, merge, combineLatest, and zip.

map transforms each value into another value. flatMap goes further — it transforms each value into a new publisher and flattens the results into a single stream.

Use flatMap when each input should trigger another async operation.