Dart Core Libraries

Overview

dart:core

The dart:core library is automatically imported into every Dart program. It provides fundamental types, collections, utilities, and annotations that are essential for Dart programming. Some key features include:

• Core types like int, double, String, bool, etc.

• Collection classes such as List, Set, Map, and Iterable.

• Useful utilities like DateTime for working with dates and times.

• Annotations like override and deprecated for annotating code.

2. dart:async

The dart:async library is used for asynchronous programming in Dart. It provides classes and utilities for working with asynchronous operations, including:

• Futures and Completers for representing asynchronous computations.

• Streams and StreamControllers for working with streams of data.

• Timers and asynchronous error handling mechanisms.

3. dart:collection

The dart:collection library provides specialized collection classes that are not available in the core dart:core library. These include:

• Queue for a collection that supports adding and removing elements efficiently.

• LinkedList for a doubly-linked list implementation.

• HashMap and LinkedHashMap for implementing hash tables.

4. dart:math

The dart:math library offers mathematical constants and functions for common mathematical operations. Key features include:

• Mathematical constants like pi and e.

• Functions for trigonometry, logarithms, exponentiation, random number generation, etc.

5. dart:convert

The dart:convert library provides encoders and decoders for converting between different data representations. This includes:

• JSON encoding and decoding using jsonEncode and jsonDecode.

• UTF-8 encoding and decoding using utf8.encode and utf8.decode.

• Base64 encoding and decoding using base64.encode and base64.decode.

6. dart:io

The dart:io library allows Dart programs to interact with the file system, sockets, processes, and other I/O operations. Note that this library is typically used in server-side or command-line applications, not in web applications.