Rangle.io : Angular Training
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Introduction
License
Why Angular?
The Architect's Guide to Angular
EcmaScript 6 and TypeScript Features
The JavaScript Toolchain
Bootstrapping an Angular Application
Components in Angular
Directives
Advanced Components
Observables
Using Observables
Error Handling
Disposing Subscriptions and Releasing Resources
Observables vs Promises
Using Observables From Other Sources
Observables Array Operations
Cold vs Hot Observables
Summary
Angular Dependency Injection
Http
Change Detection
Zone.js
Advanced Angular
What is Immutability
Pipes
Forms
Modules
Routing
State Management
TDD Testing
Migrating AngularJS Projects to Angular
Project Setup
Angular CLI
Accessibility in Angular
Internationalization in Angular
Glossary
Further Reading And Reference
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Observables vs Promises
Both Promises and Observables provide us with abstractions that help us deal with the asynchronous nature of our applications. However, there are important differences between the two:
  • As seen in the example above, Observables can define both the setup and teardown aspects of asynchronous behavior.
  • Observables are cancellable.
  • Moreover, Observables can be retried using one of the retry operators provided by the API, such as retry and retryWhen. On the other hand, Promises require the caller to have access to the original function that returned the promise in order to have a retry capability.
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Disposing Subscriptions and Releasing Resources
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Using Observables From Other Sources
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