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CodeSignal

Symbols, Iteration, and Asynchronous JavaScript

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Overview

Master the protocols and async machinery powering modern JavaScript: Symbols, iterators, generators, lazy pipelines, Promises, `async`/`await`, and async iteration with `for await…of`. Write code that integrates naturally with language features.

Syllabus

  • Unit 1: Understanding JavaScript Symbols
    • Protecting Property Keys with Symbols
    • Perfecting Your Symbol Logic
    • Make Your Objects Feel Native
    • Mastering Advanced Object Customization
  • Unit 2: Iterables and Generators
    • Unlock Native Iteration
    • Perfecting the Manual Iterator
    • Build Your Own Generators
    • Combine Iterables and Generators
  • Unit 3: Composing Lazy Pipelines
    • Build a Lazy Pipeline
    • Refine the Generator Logic
    • Build Your Own Generator Helpers
    • Build Your Lazy Generator Pipeline
  • Unit 4: Asynchronous JavaScript Patterns
    • Modernize Your Async Code
    • Boost Your Async Performance
    • Promises Working Together
    • Build Strong Async Helpers
  • Unit 5: Mastering Async Generators
    • Async Streams in Action
    • Reliable Async Stream Updates
    • Stream Your Data in Chunks
    • Handling Critical Streams

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