Can you list the main operators used in the Combine library?

In the Combine library for reactive programming in iOS, the following main operators are used:

• map — transforms stream elements by applying a function to each element.
• filter — passes only those elements that satisfy a condition.
• flatMap — transforms elements into new publishers and merges them into a single stream.
• merge — combines multiple publishers into one, emitting elements as they arrive.
• combineLatest — combines the latest values from multiple publishers.
• reduce — accumulates values into one using a folding function.
• sink — subscribes to a publisher and handles received values or errors.
• debounce — delays the transmission of elements to smooth out rapid sequences.
• removeDuplicates — removes consecutive duplicate elements.

Example of using the map operator:

let publisher = [1, 2, 3].publisher
publisher
    .map { $0 * 2 }
    .sink { print($0) }
// Will output: 2, 4, 6