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<!DOCTYPE html>
<html>
<head>
<title>Dart Cheat Sheet [Core]</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link href="./favicon.ico" rel="icon" type="image/x-icon" />
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<link href='http://fonts.googleapis.com/css?family=Open+Sans+Condensed:700%7CAnton' rel='stylesheet' type='text/css'>
<meta name="description" content="The cheat sheet references main classes and methods from Dart SDK.">
<meta name="author" content="Guillaume Girou, Nicolas François, Vincent Bostoen">
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<body>
<div id="header">
<h1>
<img alt="Dart Logo" src="img/dart-logo.png"/>
dart:core
<span class="noprint" style="display: inline">
<span class="g-plusone" data-href="http://dartlangfr.net/dart-cheat-sheet/"></span>
</span>
</h1>
<div class="nav">
<ul>
<li>
<div class="btn-group">
<a href="core.html" class="btn btn-default active"><img src="img/core32.png" alt="Core"> Core</a>
<a href="html.html" class="btn btn-default"><img src="img/html32.png" alt="HTML"> HTML</a>
<a href="angular.html" class="btn btn-default"><img src="img/angular32.png" alt="HTML"> AngularDart</a>
</div>
</li>
</ul>
</div>
</div>
<div id="content">
<div class="grid">
<div id="core-section" class="section-container">
<p>dart:core</p>
<div class="section">
<p>Built-in Types</p>
<ul class="section-content">
<li><b>Numbers</b>: num, int, double</li>
<li><b>Strings</b>: String, StringBuffer, RegExp</li>
<li><b>Booleans</b>: bool, true, false</li>
<li><b>Dates & Times</b>: DateTime, Duration, Stopwatch</li>
<li><b>Collections</b>: List<E>, Set<E>, Map<K, V></li>
</ul>
</div>
<div class="section">
<p>Object</p>
<ul class="section-content">
<li>int hashCode</li>
<li>Type runtimeType</li>
<li>String toString()</li>
</ul>
</div>
<div class="section">
<p>Annotations</p>
<ul class="section-content">
<li>@deprecated</li>
<li>@override</li>
<li>@proxy</li>
</ul>
</div>
<div class="section">
<p>RegExp</p>
<ul class="section-content">
<li>Iterable<Match> allMatches(String str)</li>
<li>Match firstMatch(String str)</li>
<li>bool hasMatch(String str)</li>
</ul>
</div>
</div>
<div id="async-section" class="section-container">
<p>dart:async</p>
<div class="section">
<p>Completer<T></p>
<ul class="section-content">
<li>Future future</li>
<li>bool complete([T value])</li>
<li>completeError(exception)</li>
</ul>
</div>
<div class="section">
<p>Future<T></p>
<ul class="section-content">
<li>new Future(computation())</li>
<li>new Future.delayed(duration, [compute()])</li>
<li>new Future.value(value)</li>
<li>new Future.error(error)</li>
<li>Future<List> Future.wait(futures)</li>
<li>Future Future.forEach(iterable, Future f(e))</li>
<li>Future Future.doWhile(f())</li>
<li>Stream<T> asStream()</li>
<li>Future catchError(onError(error))</li>
<li>Future then(onValue(value))</li>
<li>Future whenComplete(action())</li>
</ul>
</div>
<div class="section">
<p>Stream<T></p>
<ul class="section-content">
<li>new Stream.fromIterable(iterable)</li>
<li>new Stream.fromFuture(future)</li>
<li>new Stream.periodic(period)</li>
<li>new Stream.empty()</li>
<li>Future<bool> get isEmpty</li>
<li>Future<int> get length</li>
<li>Future<T> get first</li>
<li>Future<T> get last</li>
<li>Future<T> get single</li>
<li>bool get isBroadcast</li>
<li>Future<bool> any(predicate)</li>
<li>Stream<T> asBroadcastStream()</li>
<li>Stream<T> distinct()</li>
<li>Stream<T> skip(count)</li>
<li>Stream<T> skipWhile(predicate)</li>
<li>Stream<T> take(count)</li>
<li>Stream<T> where(predicate)</li>
<li>Stream<T> takeWhile(predicate)</li>
<li>Stream expand(Iterable convert(T value))</li>
<li>Stream map(convert(T event))</li>
<li>Stream transform(streamTransformer)</li>
<li>Stream<T> handleError(handle(error))</li>
<li>StreamSubscription listen(onData(event))</li>
<li>Future pipe(streamConsumer)</li>
<li>Future<bool> contains(T match)</li>
<li>Future<T> elementAt(index)</li>
<li>Future<bool> every(predicate)</li>
<li>Future<T> firstWhere(predicate)</li>
<li>Future<T> lastWhere(predicate)</li>
<li>Future<T> singleWhere(predicate)</li>
<li>Future<T> reduce(combine(previous, e))</li>
<li>Future fold(initValue, combine(previous, e))</li>
<li>Future<List<T>> toList()</li>
<li>Future<Set<T>> toSet()</li>
</ul>
</div>
<div class="section">
<p>Timer</p>
<ul class="section-content">
<li>Timer.run(callback()))</li>
<li>new Timer(duration, callback())</li>
<li>new Timer.periodic(duration, callback())</li>
<li>cancel()</li>
</ul>
</div>
<div class="section">
<p>Zone</p>
<pre class="lang-dart">
<span class="pln">runZoned</span><span class="pun">(()</span><span class="pln"> </span><span class="pun">{</span><span class="pln">
</span><span class="kwd">new</span><span class="pln"> </span><span class="typ">Future</span><span class="pun">(()</span><span class="pln"> </span><span class="pun">=></span><span class="pln"> </span><span class="kwd">throw</span><span class="pln"> </span><span class="str">"async error"</span><span class="pun">);</span><span class="pln">
</span><span class="pun">},</span><span class="pln"> onError</span><span class="pun">:</span><span class="pln"> </span><span class="pun">(</span><span class="pln">e</span><span class="pun">)</span><span class="pln"> </span><span class="pun">=></span><span class="pln"> </span><span class="kwd">print</span><span class="pun">(</span><span class="str">"Async error: $e"</span><span class="pun">));</span></pre>
</div>
</div>
<div id="keyword-section" class="section-container">
<p>Keywords</p>
<div class="section">
<ul class="section-content">
<li><b>Library</b>: library, part, part of, import, export, show, hide, deferred</li>
<li><b>Class</b>: class, enum, abstract, extends, implements, this, super, with</li>
<li><b>Constructor</b>: new, factory, const</li>
<li><b>Function</b>: operator, external</li>
<li><b>Getter / Setter</b>: get, set</li>
<li><b>Type</b>: void, null, var, dynamic, typedef, is, as, false, true</li>
<li><b>Modifier</b>: static, final, const</li>
<li><b>Control flow</b>: if, else, for, in, while, do, break, continue, return, switch, case, default, assert</li>
<li><b>Asynchrony</b>: await, async, async*, sync*, yield, yield*</li>
<li><b>Exception</b>: try, catch, finally, throw, rethrow</li>
</ul>
</div>
</div>
<div id="io-section" class="section-container">
<p>dart:io</p>
<div class="section-group">
<div class="section">
<p>File</p>
<ul class="section-content">
<li>Directory</li>
<li>File</li>
<li>Encoding</li>
</ul>
</div>
<div class="section">
<p>Stream</p>
<ul class="section-content">
<li>LineTransformer</li>
<li>StringDecoder</li>
<li>StringEncoder</li>
</ul>
</div>
<div class="section">
<p>System</p>
<ul class="section-content">
<li>Platform</li>
<li>Process</li>
</ul>
</div>
<div class="section">
<p>HTTP</p>
<ul class="section-content">
<li>ContentType</li>
<li>Cookie</li>
<li>HttpHeaders</li>
<li>HttpSession</li>
<li>HttpClient</li>
<li>HttpServer</li>
<li>WebSocket</li>
<li>Socket</li>
</ul>
</div>
</div>
</div>
<div id="http-client-section" class="section-container">
<p>package:http</p>
<div class="section">
<p>HTTP Client</p>
<ul class="section-content">
<li>Future<String> read(url)</li>
<li>Future<Response> get(url)</li>
<li>Future<Response> post(url)</li>
<li>Future<Response> put(url)</li>
<li>Future<Response> delete(url)</li>
<li>Future<Response> head(url)</li>
</ul>
</div>
<div class="section">
<p>Example</p>
<pre class="lang-dart"><span class="kwd">var</span><span class="pln"> resp </span><span class="pun">=</span> <span class="kwd">await</span> <span class="pln">http</span><span class="pun">.</span><span class="kwd">get</span><span class="pun">(</span><span class="pln">url</span><span class="pun">);</span>
</span><span class="kwd">print</span><span class="pun">(</span><span class="str">"Response status: ${resp.statusCode}"</span><span class="pun">);</span><span class="pln">
</span><span class="kwd">print</span><span class="pun">(</span><span class="str">"Response body: ${resp.body}"</span><span class="pun">);</span><span class="pln"></div>
</div>
<div id="http-server-section" class="section-container">
<p>package:http_server</p>
<div class="section">
<p>HTTP Server</p>
<ul class="section-content column2">
<li>VirtualDirectory</li>
<li>VirtualHost</li>
<li>HttpBody</li>
<li>HttpBodyFileUpload</li>
<li>HttpBodyHandler</li>
<li>HttpClientResponseBody</li>
<li>HttpMultipartFormData</li>
<li>HttpRequestBody</li>
</ul>
</div>
<div class="section">
<p>Example</p>
<pre class="lang-dart">
<span class="kwd">var</span><span class="pln"> staticFiles </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">VirtualDirectory</span><span class="pun">(</span><span class="str">'.'</span><span class="pun">)</span><span class="pln">
</span><span class="pun">..</span><span class="pln">allowDirectoryListing </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">true</span><span class="pun">;</span><span class="pln"></span>
<span class="kwd">var</span><span class="pln"> server </span><span class="pun">=</span> <span class="kwd">await</span> <span class="typ">HttpServer</span><span class="pun">.</span><span class="pln">bind</span><span class="pun">(</span><span class="str">'0.0.0.0'</span><span class="pun">,</span><span class="pln"> </span><span class="lit">7777</span><span class="pun">);
<span class="kwd">print</span><span class="pun">(</span><span class="str">'Server running'</span><span class="pun">);</span><span class="pln">
server</span><span class="pun">.</span><span class="pln">listen</span><span class="pun">(</span><span class="pln">staticFiles</span><span class="pun">.</span><span class="pln">serveRequest</span><span class="pun">);</span></pre>
</div>
</div>
<div id="isolate-section" class="section-container">
<p>dart:isolate</p>
<div class="section">
<p>Classes</p>
<ul class="section-content column2">
<li>Isolate</li>
<li>Capability</li>
<li>ReceivePort</li>
<li>SendPort</li>
</ul>
</div>
<div class="section">
<p>Isolate</p>
<ul class="section-content">
<li>Isolate.spawn(entryPoint(msg), msg)</li>
<li>Isolate.spawnUri(Uri uri, List args, msg)</li>
<li>SendPort controlPort</li>
<li>Stream errors</li>
<li>pause()</li>
<li>resume()</li>
<li>kill()</li>
</ul>
</div>
<div class="section">
<p>Examples</p>
<pre style="" class="lang-dart"><span class="pln">Isolate</span><span class="pun">.</span><span class="pln">spawn</span><span class="pun">(</span><span class="pln">entryPoint</span><span class="pun">,</span><span class="pln"> </span><span class="str">"Hello"</span><span class="pun">);</span><span class="pln">
</span><span class="pln">entryPoint</span><span class="pun">(</span><span class="pln">msg</span><span class="pun">)</span><span class="pln"> </span><span class="pln">
</span><span class="pun">=></span><span class="pln"> print</span><span class="pun">(</span><span class="str">"$msg from isolate!"</span><span class="pun">);</span><span class="pln">
Isolate</span><span class="pun">.</span><span class="pln">spawnUri</span><span class="pun">(</span><span class="kwd">new</span><span class="pln"> Uri</span><span class="pun">.</span><span class="pln">file</span><span class="pun">(</span><span class="str">"hello.dart"</span><span class="pun">),</span><span class="pln">
</span><span class="pun">[],</span><span class="pln"> </span><span class="str">"World"</span><span class="pun">);</span></pre>
</div>
</div>
<div id="mirrors-section" class="section-container">
<p>dart:mirrors</p>
<div class="section">
<ul class="section-content">
<li>MirrorSystem currentMirrorSystem()</li>
<li>InstanceMirror reflect(Object reflectee)</li>
<li>ClassMirror reflectClass(Type key)</li>
<li>TypeMirror reflectType(Type key)</li>
</ul>
</div>
</div>
<div id="operators-section" class="section-container">
<p>Operators</p>
<div class="section">
<ul class="section-content">
<li><b>Arithmetics</b>: + - * / %
~/ -<em class="replaceable"><code>expr</code></em>
</li>
<li><b>Increment / Decrement</b>: <em class="replaceable"><code>expr</code></em>++
<em class="replaceable"><code>expr</code></em>--
++<em class="replaceable"><code>expr</code></em>
--<em class="replaceable"><code>expr</code></em>
</li>
<li><b>Bitwise</b>: & | ^ ~<em class="replaceable"><code>expr</code></em> << >></li>
<li><b>Comparison</b>: == !=
>= >
<= <
</li>
<li><b>Logical</b>: && || !<em class="replaceable"><code>expr</code></em></li>
<li><b>Conditional</b>: <em class="replaceable"><code>condition</code></em> ?
<em class="replaceable"><code>expr1</code></em> :
<em class="replaceable"><code>expr2</code></em><br>
<em class="replaceable"><code>ifNullExpr</code></em> ??
<em class="replaceable"><code>thenValueExpr</code></em>
</li>
<li><b>Assignment</b>: = *= /=
~/= %= += -=
<<= >>= &=
^= |= ??=
</li>
<li><b>Accessors</b>: [] . .. ?.</li>
<li><b>Type / Argument</b>: as is is! ?<em class="replaceable"><code>identifier</code></em></li>
<li><b>Symbol</b>: #<code>identifier</code></li>
</ul>
</div>
</div>
<div id="test-section" class="section-container">
<p>Test</p>
<div class="section">
<p>Unit test functions</p>
<ul class="section-content">
<li>test(String spec, TestFunction body)</li>
<li>expect(actual, matcher)</li>
<li>fail(String message)</li>
<li>group(String description, body())</li>
<li>setUp(Function setupTest)</li>
<li>tearDown(Function teardownTest)</li>
</ul>
</div>
<div class="section">
<p>Matchers</p>
<ul class="section-content">
<li>is<i>[InstanceOf, List | Map]</i></li>
<li>is<i>[Null | NotNull]</i></li>
<li>matches, predicate, wrapMatcher</li>
<li>isNot, anyOf, allOf, someElement, everyElement</li>
<li>anything, returnsNormally</li>
<li>equals, same, unorderedEquals, orderedEquals</li>
<li>completes, wrapAsync, completion</li>
<li>is<i>[True, False]</i></li>
<li>is<i>[Negative | NonNegative | NonPositive | Positive | NonZero | Zero]</i></li>
<li>in<i>[ClosedOpen, CloseOpen, Exclusive, Inclusive ]</i>Range, closeTo, lessThanOrEqualTo, lessThan, greaterThanOrEqualTo, greaterThan</li>
<li>stringContainsInOrder, endsWith, startsWith, equalsIgnoringWhitespace, equalsIgnoringCase</li>
<li>containsPair, containsValue, isIn, contains, isEmpty, hasLength</li>
<li>is<i>[ArgumentError | Exception | FormatException | RangeError | StateError | UnimplementedError | UnsupportedError | NoSuchMethodError]</i></li>
<li>throws, throws<i>[A | ArgumentError | Exception | FormatException | NoSuchMethodError | RangeError | StateError | UnimplementedError | UnsupportedError]</i></li>
</ul>
</div>
<div class="section">
<p>Mocks</p>
<ul class="section-content">
<li class="section-content">
<p>Top-level functions</p>
<ul class="section-content">
<li>happened<i>[AtLeastOnce, AtMostOnce, Once, AtMost, AtLeast, Exactly]</i>, neverHappened</li>
<li>sharedLog</li>
<li><i>[never, sometime, always]</i>Threw, throwing</li>
<li><i>[never, sometime, always]</i>Returned</li>
<li>returning</li>
<li>callsTo</li>
</ul>
</li>
<li class="section-content">
<p>Mock class</p>
<ul class="section-content">
<li>new Mock(), new Mock.custom(), new Mock.spy(Object realObject)</li>
<li>log, logging, name</li>
<li>calls(), clearLogs(), getLogs(), reset(), resetBehavior(), verifyZeroInteractions(), when(CallMatcher logFilter)</li>
</ul>
</li>
</ul>
</div>
</div>
<div id="collection-section" class="section-container">
<p>dart:collection</p>
<table class="section table table-condensed no-padding">
<thead>
<tr>
<th></th>
<th>Unordered</th>
<th>Ordered</th>
<th>Sorted</th>
</tr>
</thead>
<tbody>
<tr>
<th>List</th>
<td></td>
<td>List</td>
<td></td>
</tr>
<tr>
<th>Set</th>
<td>HashSet</td>
<td>LinkedHashSet</td>
<td>SplayTreeSet</td>
</tr>
<tr>
<th>Map</th>
<td>HashMap</td>
<td>LinkedHashMap</td>
<td>SplayTreeMap</td>
</tr>
</tbody>
</table>
<div class="section">
<p>Iterable</p>
<ul class="section-content">
<li>const Iterable.empty()</li>
<li>new Iterable.generate(count, generator(i))</li>
<li>bool isEmpty</li>
<li>bool isNotEmpty</li>
<li>Iterator<E> iterator</li>
<li>int length</li>
<li>E first</li>
<li>E single</li>
<li>E last</li>
<li>E elementAt(index)</li>
<li>E firstWhere(predicate)</li>
<li>E lastWhere(predicate)</li>
<li>singleWhere(predicate)</li>
<li>bool contains(e)</li>
<li>bool any(predicate)</li>
<li>bool every(predicate)</li>
<li>Iterable map(f(E e))</li>
<li>Iterable expand(Iterable f(E e))</li>
<li>Iterable<E> where(predicate)</li>
<li>forEach(f(E e))</li>
<li>Iterable<E> skip(n)</li>
<li>Iterable<E> skipWhile(predicate)</li>
<li>Iterable<E> take(n)</li>
<li>Iterable<E> takeWhile(predicate)</li>
<li>E reduce(combine(E value, E e))</li>
<li>fold(initValue, combine(previous, e))</li>
<li>String join([separator])</li>
<li>List<E> toList()</li>
<li>Set<E> toSet()</li>
</ul>
</div>
<div class="section">
<p>List</p>
<ul class="section-content">
<li>add(E e)</li>
<li>insert(index, E e)</li>
<li>addAll(Iterable<E> elements)</li>
<li>remove(Object element)</li>
<li>retainWhere(predicate)</li>
<li>insertAll(index, Iterable<E> iterable)</li>
<li>setAll(index, Iterable<E> iterable)</li>
<li>clear()</li>
<li>E operator [ ](index)</li>
<li>operator [ ]=(index, E value)</li>
<li>Iterable<E> get reversed</li>
<li>sort([comparator])</li>
<li>indexOf(E e, [start = 0])</li>
<li>int lastIndexOf(E e, [start])</li>
<li>E removeAt(index)</li>
<li>E removeLast()</li>
<li>List<E> sublist(int start, [int end])</li>
<li>removeRange(int start, int end)</li>
<li>fillRange(int start, int end, [E fillValue])</li>
<li>replaceRange(int start, int end, Iterable<E> iterable)</li>
<li>setRange(start, end, Iterable<E> iterable)</li>
<li>Map<int, E> asMap()</li>
</ul>
</div>
<div class="section">
<p>Map</p>
<ul class="section-content">
<li>clear()</li>
<li>bool containsValue(V value)</li>
<li>bool containsKey(K key)</li>
<li>V operator [ ](K key)</li>
<li>operator [ ]=(K key, V value)</li>
<li>V putIfAbsent(K key, V ifAbsent())</li>
<li>V remove(K key)</li>
<li>forEach(f(K key, V value))</li>
<li>Iterable<K> get keys</li>
<li>Iterable<V> get values</li>
</ul>
</div>
</div>
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