1. Dart Cheat Sheet Github
2. Dart Cheat Sheet 2020
3. Dart Out Cheat Sheet
4. Dart Cheat Sheet 2021
5. Darts Out Chart Printable
6. 301 Out Chart Printable

dart:core

Built-in Types

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• Numbers: num, int, double
• Strings: String, StringBuffer, RegExp
• Booleans: bool, true, false
• Dates & Times: DateTime, Duration, Stopwatch
• Collections: List<E>, Set<E>, Map<K, V>

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Object

• int hashCode
• Type runtimeType
• String toString()

RegExp

• Iterable<Match> allMatches(String str)
• Match firstMatch(String str)
• bool hasMatch(String str)

Dart Cheat Sheet Github

dart:async

Completer<T>

Dart Cheat Sheet 2020

• Future future
• bool complete([T value])
• completeError(exception)

Future<T>

• new Future(computation())
• new Future.delayed(duration, [compute()])
• new Future.value(value)
• new Future.error(error)
• Future<List> Future.wait(futures)
• Future Future.forEach(iterable, Future f(e))
• Future Future.doWhile(f())
• Stream<T> asStream()
• Future catchError(onError(error))
• Future then(onValue(value))
• Future whenComplete(action())

Stream<T>

• new Stream.fromIterable(iterable)
• new Stream.fromFuture(future)
• new Stream.periodic(period)
• new Stream.empty()
• Future<bool> get isEmpty
• Future<int> get length
• Future<T> get first
• Future<T> get last
• Future<T> get single
• bool get isBroadcast
• Future<bool> any(predicate)
• Stream<T> asBroadcastStream()
• Stream<T> distinct()
• Stream<T> skip(count)
• Stream<T> skipWhile(predicate)
• Stream<T> take(count)
• Stream<T> where(predicate)
• Stream<T> takeWhile(predicate)
• Stream expand(Iterable convert(T value))
• Stream map(convert(T event))
• Stream transform(streamTransformer)
• Stream<T> handleError(handle(error))
• StreamSubscription listen(onData(event))
• Future pipe(streamConsumer)
• Future<bool> contains(T match)
• Future<T> elementAt(index)
• Future<bool> every(predicate)
• Future<T> firstWhere(predicate)
• Future<T> lastWhere(predicate)
• Future<T> singleWhere(predicate)
• Future<T> reduce(combine(previous, e))
• Future fold(initValue, combine(previous, e))
• Future<List<T>> toList()
• Future<Set<T>> toSet()

Timer

Dart Out Cheat Sheet

• Timer.run(callback()))
• new Timer(duration, callback())
• new Timer.periodic(duration, callback())
• cancel()

Keywords

• Library: library, part, part of, import, export, show, hide, deferred
• Class: class, enum, abstract, extends, implements, this, super, with
• Constructor: new, factory, const
• Function: operator, external
• Getter / Setter: get, set
• Type: void, null, var, dynamic, typedef, is, as, false, true
• Modifier: static, final, const
• Control flow: if, else, for, in, while, do, break, continue, return, switch, case, default, assert
• Asynchrony: await, async, async*, sync*, yield, yield*
• Exception: try, catch, finally, throw, rethrow

dart:io

Stream

• LineTransformer
• StringDecoder
• StringEncoder

HTTP

• ContentType
• Cookie
• HttpHeaders
• HttpSession
• HttpClient
• HttpServer
• WebSocket
• Socket

package:http

HTTP Client

• Future<String> read(url)
• Future<Response> get(url)
• Future<Response> post(url)
• Future<Response> put(url)
• Future<Response> delete(url)
• Future<Response> head(url)

dart:isolate

Isolate

• Isolate.spawn(entryPoint(msg), msg)
• Isolate.spawnUri(Uri uri, List args, msg)
• SendPort controlPort
• Stream errors
• pause()
• resume()
• kill()

Dart Cheat Sheet 2021

dart:mirrors

• MirrorSystem currentMirrorSystem()
• InstanceMirror reflect(Object reflectee)
• ClassMirror reflectClass(Type key)
• TypeMirror reflectType(Type key)

Operators

• Arithmetics: + - * / % ~/ -expr
• Increment / Decrement: expr++ expr-- ++expr --expr
• Bitwise: & | ^ ~expr << >>
• Comparison: != >= > <= <
• Logical: && || !expr
• Conditional: condition ? expr1 : expr2
ifNullExpr ?? thenValueExpr
• Assignment: = *= /= ~/= %= += -= <<= >>= &= ^= |= ??=
• Accessors: [] . .. ?.
• Type / Argument: as is is! ?identifier
• Symbol: #identifier

Test

Unit test functions

• test(String spec, TestFunction body)
• expect(actual, matcher)
• fail(String message)
• group(String description, body())
• setUp(Function setupTest)
• tearDown(Function teardownTest)

Matchers

• is[InstanceOf, List | Map]
• is[Null | NotNull]
• matches, predicate, wrapMatcher
• isNot, anyOf, allOf, someElement, everyElement
• anything, returnsNormally
• equals, same, unorderedEquals, orderedEquals
• completes, wrapAsync, completion
• is[True, False]
• is[Negative | NonNegative | NonPositive | Positive | NonZero | Zero]
• in[ClosedOpen, CloseOpen, Exclusive, Inclusive ]Range, closeTo, lessThanOrEqualTo, lessThan, greaterThanOrEqualTo, greaterThan
• stringContainsInOrder, endsWith, startsWith, equalsIgnoringWhitespace, equalsIgnoringCase
• containsPair, containsValue, isIn, contains, isEmpty, hasLength
• is[ArgumentError | Exception | FormatException | RangeError | StateError | UnimplementedError | UnsupportedError | NoSuchMethodError]
• throws, throws[A | ArgumentError | Exception | FormatException | NoSuchMethodError | RangeError | StateError | UnimplementedError | UnsupportedError]

Mocks

• Top-level functions

  • happened[AtLeastOnce, AtMostOnce, Once, AtMost, AtLeast, Exactly], neverHappened
  • sharedLog
  • [never, sometime, always]Threw, throwing
  • [never, sometime, always]Returned
  • returning
  • callsTo

• Mock class

  • new Mock(), new Mock.custom(), new Mock.spy(Object realObject)
  • log, logging, name
  • calls(), clearLogs(), getLogs(), reset(), resetBehavior(), verifyZeroInteractions(), when(CallMatcher logFilter)

dart:collection

Iterable

• const Iterable.empty()
• new Iterable.generate(count, generator(i))
• bool isEmpty
• bool isNotEmpty
• Iterator<E> iterator
• int length
• E first
• E single
• E last
• E elementAt(index)
• E firstWhere(predicate)
• E lastWhere(predicate)
• singleWhere(predicate)
• bool contains(e)
• bool any(predicate)
• bool every(predicate)
• Iterable map(f(E e))
• Iterable expand(Iterable f(E e))
• Iterable<E> where(predicate)
• forEach(f(E e))
• Iterable<E> skip(n)
• Iterable<E> skipWhile(predicate)
• Iterable<E> take(n)
• Iterable<E> takeWhile(predicate)
• E reduce(combine(E value, E e))
• fold(initValue, combine(previous, e))
• String join([separator])
• List<E> toList()
• Set<E> toSet()

List

• add(E e)
• insert(index, E e)
• addAll(Iterable<E> elements)
• remove(Object element)
• retainWhere(predicate)
• insertAll(index, Iterable<E> iterable)
• setAll(index, Iterable<E> iterable)
• clear()
• E operator [ ](index)
• operator [ ]=(index, E value)
• Iterable<E> get reversed
• sort([comparator])
• indexOf(E e, [start = 0])
• int lastIndexOf(E e, [start])
• E removeAt(index)
• E removeLast()
• List<E> sublist(int start, [int end])
• removeRange(int start, int end)
• fillRange(int start, int end, [E fillValue])
• replaceRange(int start, int end, Iterable<E> iterable)
• setRange(start, end, Iterable<E> iterable)
• Map<int, E> asMap()

Map

• clear()
• bool containsValue(V value)
• bool containsKey(K key)
• V operator [ ](K key)
• operator [ ]=(K key, V value)
• V putIfAbsent(K key, V ifAbsent())
• V remove(K key)
• forEach(f(K key, V value))
• Iterable<K> get keys
• Iterable<V> get values

Darts Out Chart Printable

301 Out Chart Printable