#### [CallbagKit][Callbag] › [Documentation][Documentation]
# Operators

> Most operators operate on a source and return a source. This allows you to
> apply these operators one after the other, in a chain. Each operator in the
> chain modifies the source that results from the operation of the previous operator.
> 
> There are other patterns, like the Builder Pattern, in which a variety of
> methods of a particular class operate on an item of that same class by
> modifying that object through the operation of the method. These patterns
> also allow you to chain the methods in a similar way. But while in the Builder
> Pattern, the order in which the methods appear in the chain does not usually
> matter, with the source operators order matters.
> 
> A chain of source operators do not operate independently on the original source
> that originates the chain, but they operate in turn, each one operating on the
> source generated by the operator immediately previous in the chain.

1. [**Combining**](./Combining/README.md)
   1. [Combine](./Combining/Combine.md)
   2. [Concat](./Combining/Concat.md)
   3. [Merge](./Combining/Merge.md)
   4. [Race](./Combining/Race.md)
   5. [SwitchLatest](./Combining/SwitchLatest.md)
   6. [Zip](./Combining/Zip.md)
2. [**Debugging**](./Debugging/README.md)
   1. [Breakpoint](./Debugging/Breakpoint.md)
   2. [Debug](./Debugging/Debug.md)
   3. [Print](./Debugging/Print.md)
   4.  [Tap](./Debugging/Tap.md)
3. [**ErrorHandling**](./ErrorHandling/README.md)
   1.  [Assert](./ErrorHandling/Assert.md)
   2.  [CatchError](./ErrorHandling/CatchError.md)
   3.  [MapError](./ErrorHandling/MapError.md)
   4.  [Retry](./ErrorHandling/Retry.md)
4.  [**Filtering**](./Filtering/README.md)
    1.  [Distinct](./Filtering/Distinct.md)
    2.  [Filter](./Filtering/Filter.md)
    3.  [Reject](./Filtering/Reject.md)
    4.  [IgnoreElements](./Filtering/IgnoreElements.md)
    5.  [First](./Filtering/First.md)
    6.  [Last](./Filtering/Last.md)
    7.  [Drop](./Filtering/Drop.md)
    8.  [Skip](./Filtering/Skip.md)
    9.  [Take](./Filtering/Take.md)
5.  [**Matching**](./Matching/README.md)
    1.  [AllSatisfy](./Matching/AllSatisfy.md)
    2.  [Contains](./Matching/Contains.md)
6.  [**Mathematical**](./Mathematical/README.md)
    1.  [Average](./Mathematical/Average.md)
    2.  [Count](./Mathematical/Count.md)
    3.  [Max](./Mathematical/Max.md)
    4.  [Min](./Mathematical/Min.md)
    5.  [Sum](./Mathematical/Sum.md)
7.  [**Threading**](./Threading/README.md)
    1.  [Async](./Threading/Async.md)
    2.  [Sync](./Threading/Sync.md)
    3.  [Blocking](./Threading/Blocking.md)
8.  [**Timing**](./Timing/README.md)
    1.  [Debounce](./Timing/Debounce.md)
    2.  [Throttle](./Timing/Throttle.md)
    3.  [Durations](./Timing/Durations.md)
    4.  [Timestamps](./Timing/Timestamps.md)
    5.  [Timeout](./Timing/Timeout.md)
    6.  [Delay](./Timing/Delay.md)
    7.  [Wait](./Timing/Wait.md)
9.  [**Transforming**](./Transforming/README.md)
    1.  [Indices](./Transforming/Indices.md)
    2.  [Buffer](./Transforming/Buffer.md)
    3.  [Collect](./Transforming/Collect.md)
    4.  [Codable](./Transforming/Codable.md)
    5.  [Components](./Transforming/Components.md)
    6.  [Split](./Transforming/Split.md)
    7.  [Joined](./Transforming/Joined.md)
    8.  [De-Materialize](./Transforming/De-Materialize.md)
    9.  [Map](./Transforming/Map.md)
    10. [Compact](./Transforming/Compact.md)
    11. [FlatMap](./Transforming/FlatMap.md)
    12. [Pluck](./Transforming/Pluck.md)
    13. [Group](./Transforming/Group.md)
    14. [Partition](./Transforming/Partition.md)
    15. [Reduce](./Transforming/Reduce.md)
    16. [Loop](./Transforming/Loop.md)
    17. [Scan](./Transforming/Scan.md)
    18. [Repeats](./Transforming/Repeats.md)
    19. [Replace](./Transforming/Replace.md)

[Callbag]: <../../README.md> (Callbag)
[Documentation]: <../README.md> (Documentation)