Dart / Foundations: values, absence, collections, and valid objects

Dart β€” Foundations: values, absence, collections, and valid objects

Understand core Dart operations, visible function contracts, null safety, collection ownership, construction, and typed failure handling.

6 lessons Β· No account required

What you will learn

  • Predict small source examples and distinguish types, validation, mutation, and cleanup.

  1. Understand Dart values, types, final, and const

    Read a small Dart entry point and distinguish inferred types, reassignment, constant objects, numeric operations, and platform assumptions.

    Start learning

  2. Write decisions and functions with visible contracts

    Use strict Boolean conditions, bounded loops, named arguments, and first-class functions to express a small batch policy.

    Start learning

  3. Handle absence without hiding invalid input

    Use nullable types, promotion, null-aware operators, and tryParse while keeping late initialization and assertions explicit.

    Start learning

  4. Choose collections and understand lazy Iterable work

    Use typed lists, sets, maps, collection elements, lazy transformations, and explicit snapshots without confusing interfaces with immutability.

    Start learning

  5. Build valid objects and understand library privacy

    Use fields, initializing formals, named and const constructors, getters, and explicit state transitions in Dart.

    Start learning

  6. Separate expected rejection from exceptions and cleanup

    Use tryParse, typed on/catch boundaries, rethrow, and finally without turning every defect into a plausible success.

    Start learning
Back to course