Chapter 8. Working with basic query operators

This chapter covers

  • Mapping and transforming the notification datum
  • Filtering and choosing which notifications to observe
  • Creating observables of distinct items
  • Aggregating and quantifying notifications

After a source observable emits a notification, there’s often a pipeline the notification goes through before it reaches the destined observer. Almost every example in this book shows how operators are used in some way to manipulate a generated sequence of notifications, which your observers eventually observe. This chapter categorizes and explains the basic operators that you’ll use to create queries on the observables at hand. These include transformations and mappings, filtering and flattening, ...

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