Dart Tutorial
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Dart Chapter 5 of 15

Collections

Store and process groups of values with lists, sets and maps, then filter, transform and combine them.

Real programs deal with many values at once: a list of messages, a set of tags, a table of prices. Dart’s collections hold those values and come with powerful tools for searching and reshaping them.

Lessons in this chapter

  1. Dart Collections: List, Set and Map OverviewAn overview of collections in Dart. Compare List, Set and Map, learn collection literals and generics, and choose the right one.
  2. Lists in Dart: Create, Access, Add, Remove and SortComplete guide to List in Dart: creating lists, indexing, adding and removing items, searching, sorting, sublists and fixed-length lists.
  3. Sets in Dart: Unique Collections and Set OperationsLearn Set in Dart: storing unique values, fast lookups, and set operations such as union, intersection and difference.
  4. Maps in Dart: Key-Value Pairs ExplainedLearn Map in Dart: create key-value pairs, read, add, update and remove entries, loop over a map, and handle missing keys safely.
  5. MapEntry in Dart: Working with Map EntriesUse MapEntry and the entries property in Dart to sort, filter, transform and rebuild maps with fromEntries and map.
  6. Iterable in Dart: Lazy Sequences ExplainedUnderstand Iterable in Dart, the parent of List and Set. Learn lazy evaluation, take, skip, firstWhere and when to call toList.
  7. where, map, reduce and fold in Dart: Filter and Transform CollectionsFilter, transform and summarise collections in Dart with where, map, expand, reduce, fold, any and every, with practical examples.
  8. Spread Operator, Collection if and Collection for in DartBuild lists, sets and maps in Dart using the spread operator (...), null-aware spread, collection if and collection for.
  9. Queue in Dart: Adding and Removing from Both EndsLearn the Queue class from dart:collection. Add and remove items at both ends efficiently, and build FIFO queues and stacks.
  10. Collection Performance in Dart: Choosing the Fastest StructureUnderstand the speed of common List, Set and Map operations in Dart, and learn practical tips for writing faster collection code.