|author||Lasse R.H. Nielsen <email@example.com>||Thu Nov 19 08:17:32 2015 +0100|
|committer||Lasse R.H. Nielsen <firstname.lastname@example.org>||Thu Nov 19 08:17:32 2015 +0100|
Add string comparators that can compare ASCII strings ignoring case. Also add comparators that compare digit sequences lexicographically (which is the same as comparing numerically if there are no leading zeros). The comparison functions define total orderings, breaking ties for strings that only differ by case by their first case-different letter, upper-case being less than lower-case. Remail@example.com, firstname.lastname@example.org, email@example.com Review URL: https://codereview.chromium.org//1412293008.
#Helper libraries for working with collections.
collection package contains a number of separate libraries with utility functions and classes that makes working with collections easier.
collection package can be imported as separate libraries, or in totality:
import 'package:collection/algorithms.dart'; import 'package:collection/equality.dart'; import 'package:collection/iterable_zip.dart'; import 'package:collection/priority_queue.dart'; import 'package:collection/wrappers.dart';
The algorithms library contains functions that operate on lists.
It contains ways to shuffle a
List, do binary search on a sorted
List, and various sorting algorithms.
The equality library gives a way to specify equality of elements and collections.
Collections in Dart have no inherent equality. Two sets are not equal, even if they contain exactly the same objects as elements.
The equality library provides a way to say define such an equality. In this case, for example,
const SetEquality(const IdentityEquality()) is an equality that considers two sets equal exactly if they contain identical elements.
The library provides ways to define equalities on
Maps, as well as combinations of these, such as:
const MapEquality(const IdentityEquality(), const ListEquality());
This equality considers maps equal if they have identical keys, and the corresponding values are lists with equal (
Utilities for “zipping” a list of iterables into an iterable of lists.
An interface and implemention of a priority queue.
The wrappers library contains classes that “wrap” a collection.
A wrapper class contains an object of the same type, and it forwards all methods to the wrapped object.
Wrapper classes can be used in various ways, for example to restrict the type of an object to that of a supertype, or to change the behavior of selected functions on an existing object.
Please file feature requests and bugs at the issue tracker.