Combine framework

---

Books

• Combine: Asynchronous Programming with Swift
  • Book: https://www.kodeco.com/books/combine-asynchronous-programming-with-swift
  • GitHub: https://github.com/kodecocodes/comb-materials
• Practical Combine
  • Book: https://donnywals.gumroad.com/l/practical-combine
• WWDC
  • Introducing Combine: https://www.wwdcnotes.com/notes/wwdc19/722/
  • Combine in Practice: https://www.wwdcnotes.com/notes/wwdc19/721/
  • Advances in Networking, Part 1: https://www.wwdcnotes.com/notes/wwdc19/712/
  • Advances in Networking, Part 2: https://www.wwdcnotes.com/notes/wwdc19/713/
  • GitHub: https://github.com/WWDCNotes/Content

---

Section1: Introduction

• Publisher

  • Read about publisher #58
  • Built-in publishers
    • Just #59, Future #60
    • Empty #61, Fail #62
    • Deferred #63
    • Record #64
  • Custom publisher
    • DefaultValue #65
    • DefaultError #66
  • Practices
    • NotificationCenter #67
    • URLSession #68
    • UserDefaults #69
    • JSON parsing #70
    • assign(to:on:) #71

• Subscriber

  • Read about subscriber #72
  • Built-in subscribers
    • sink(receiveCompletion:receiveValue:) #59
    • assign(to:on:) #71
  • Custom subscribers
    • IntSubscriber #74
  • Practices
    • sink(receiveCompletion:receiveValue:) #59
    • assign(to:on:) #71
    • IntSubscriber #74

• Subject (Publisher & Subscriber)

  • Read about subject #75
  • Built-in subjects
    • PassthroughSubject #76
    • CurrentValueSubject #77
  • Custom subjects? #76, #77
  • Practices #76, #77

  ---

Section2: Operators

• Transforming Operators

  • Collecting values #78
  • Mapping values
    • map value #79
    • map keypath value #80
    • tryMap value #81
  • Flattening publishers #82
  • Replacing/transforming upstream output
    • replaceNil(with:) #83
    • replaceEmpty(with:) #84
    • scan(initialResult, with:) #85
  • Practices #78, #79, #80, #81, #82, #83, #84, #85

• Filtering Operators

  • Compacting and ignoring
    • filter(_:) tryFilter(_:) #87
    • removeDuplicates(by:) tryRemoveDuplicates(by:) #88
    • compactMap(_:) tryCompactMap(_:) #89
    • ignoreOutput() #90
  • Finding values
    • first() first(where:) tryFirst(where:) #91
    • last() last(where:) tryLast(where:) #91
  • Droping values
    • dropFirst(_:) #92
    • drop(while:) tryDrop(while:) #92
    • drop(untilOutputFrom:) #92
  • Limiting values
    • prefix(_:) #93
    • prefix(while:) tryPrefix(while:) #93
    • prefix(untilOutputFrom:) #93
  • Practices #87, #88, #89, #90, #91, #92, #93, #94

• Combining Operators

  • Combining
    • prepend(_:) #95
    • prepend(Publisher) #96
    • append(_:) #97
    • switchToLatest() #98
    • merge(with:) #99
    • combineLatest(_:_:) #100
    • zip(_:) #101
  • Practices #95, #96, #97, #98, #99, #100, #101, #102

• Time manipulation Operators

  • Shifting time #103
  • Collecting values #104
  • Holding off events
    • debounce(for:scheduler:options:) #105
    • throttle(for:scheduler:latest:) #106
  • Timing out #107
  • Measuring time #108
  • Practices #103, #104, #105, #106, #107, #108, #109

• Sequence Operators

  • Finding values
    • min() #110 min(by:) #111
    • max() #112 max(by:) #113
    • first() #114 first(where:) #115
    • last() #116 last(where:) #117
    • output(at:) #118 output(in:) #119
  • Query the publisher
    • count() #120
    • contains(_:) #121 contains(where:) #122
    • allSatisfy(_:) #123
    • reduce(_:_:) #124
  • Practices #110, #111, #112, #113, #114, #115, #116, #117, #118, #119, #120, #121, #122, #123, #124, #125

  ---

Section3: Combine in action

• Networking

  • URLSession extensions #126
  • Codable support #127
  • Publishing network data #128
  • Practices #126, #127, #128, #129

• Debugging

  • Printing events #130
  • Acting on events #131
  • Using Breakpoint debugger #132
  • Practices #130, #131, #132, #133

• Error Handling

  • Never #134
  • Dealing with failure #135
    • try-prefixed operators i.e tryMap
    • mapError(_:)
    • replaceError(with:)
  • Practices #134, #135, #136

• Schedulers

  • Operators for scheduling #137
    • subscribe(on:) and subscribe(on:options:)
    • receive(on:) and receive(on:options:)
  • Scheduler implementations
    • ImmediateScheduler #138
    • RunLoop DispatchQueue OperationQueue #139
  • Practices #137, #138, #139, #140

• Timers

  • Using RunLoop #141
  • Using Timer class #142
  • Using DispatchQueue #143
  • Practices #141, #142, #143, #144

• Key-value Observing

  • KVO introduction #145
  • ObservableObject #146
  • Practices #145, #146, #147

  ---

Section4: Production code

• Complete app
  • Build app #148
  • Unit testing

---

Start SwiftUI framework