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RxJS
1. Introduction to Reactive Programming
2. Core Concepts of RxJS
3. Creating Observables
4. Managing Subscriptions and Memory
5. Transformation Operators
6. Filtering Operators
7. Combination Operators
8. Error Handling Operators
9. Utility Operators
10. Higher-Order Observables
11. Subjects and Multicasting
12. Schedulers
13. Practical Patterns and Use Cases
14. Testing RxJS Code
15. Advanced Topics
Utility Operators
tap
Side Effects Without Modification
Debugging and Logging
Observer Functions
delay
Delaying Emissions
Delay Duration
Scheduler Configuration
delayWhen
Conditional Delays
Delay Selector Functions
finalize
Cleanup Actions
Teardown Logic
timeout
Error on Timeout
Timeout Duration
Timeout Configuration
timeoutWith
Switching to Another Observable on Timeout
toArray
Collecting All Emissions into Array
count
Counting Emissions
Predicate Functions
max
Finding Maximum Value
Comparer Functions
min
Finding Minimum Value
Comparer Functions
isEmpty
Checking for Empty Observables
defaultIfEmpty
Providing Default Values for Empty Observables
every
Testing All Values Against Predicate
find
Finding First Matching Value
Predicate Functions
findIndex
Finding Index of First Matching Value
includes
Checking for Value Inclusion
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8. Error Handling Operators
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10. Higher-Order Observables