core library Core

General purpose utilities for every Dart program.

Annotations

Annotations that express intent, similar to those in package:meta.

Mixins that simplify implementation of Comparable, utilities for working with Comparable, and determining deep equality of inbuilt collections.

Mixin for implementing Comparable:

Deep equality:

Type definitions for common functions, and monads.

Function type definitions:

Monads:

Utilities for manipulating primitive types, i.e. bool and String.

Failure<S extends Object, F extends Object>: Represents a failure.
NotTested: Denotes that the annotated element is not tested.
Possible: Denotes that an annotated element may return the given error codes or throw the given exceptions.
Result<S extends Object, F extends Object>: A Result represents the result of an operation. It is a Success or Failure.
Success<S extends Object, F extends Object>: Represents a success.

Disposable: A Disposable holds resources such as sockets and streams that need to be manually disposed.
Orderable<T extends Orderable<T>>: Simplifies implementation of naturally ordered types.

Bools on bool: Provides functions for working with booleans.
Comparators on Comparator<T>: Provides functions for working with Comparators.
DeepEqualityIterable on Iterable<Object?>: Provides functions for determining the deep equality of Iterables.
DeepEqualityMap on Map<Object?, Object?>: Provides functions for determining the deep equality of Maps.
DeepEqualityMapEntry on MapEntry<Object?, Object?>: Provides functions for determining the deep equality of MapEntrys.
Equality on Never: Provides functions that determine the deep equality of objects.
FutureMaybe on Future<T?>: Provides functions for working with asynchronous Maybes.
HashCodes on Never: Provides functions that compute the deep hashcodes of objects.
Maybe on T?: A Maybe monad that may or may not contain a T.
StringBuffers on StringBuffer: Provides functions for working with StringBuffers.
Strings on String: Provides functions that manipulate Strings.

max<T>(T a, T b, {Select<T, Comparable<Object>>? by}) → T: Returns the greater of a and b.
min<T>(T a, T b, {Select<T, Comparable<Object>>? by}) → T: Returns the lesser of a and b.

Callback = void Function(): A callback that has no arguments and returns nothing.
Consume<T> = void Function(T value): An operation that accepts a single argument and returns nothing.
Predicate<T> = bool Function(T value): A predicate (boolean-valued function) of one argument.
Select<T, R> = R Function(T value): A selector of one argument.
Supply<T> = T Function(): A supplier of Ts.