ObservableNullableString class

Observable class for String Type.

Inheritance
Implemented types
Available extensions

Constructors

ObservableNullableString(String? initialValue)

Properties

codeUnits → List<int>?

Available on Observable<String?>, provided by the ObservablenStringExt extension

Returns an unmodifiable list of the UTF-16 code units of this string.
no setter
codeUnits → List<int>

Available on Observable<String>, provided by the ObservableStringExt extension

Returns an unmodifiable list of the UTF-16 code units of this string.
no setter
done → Future
A future which is completed when the stream controller is done sending events.
no setterinherited
errorAndStackTrace ↔ ErrorAndStackTrace?
getter/setter pairinherited
errorOrNull → Object?
Returns the last emitted error, or null if error events haven't yet been emitted.
no setterinherited
first → Future<String?>
The first element of this stream.
no setterinherited
hasError → bool
Returns true when error is available, meaning this Stream has emitted at least one error.
no setterinherited
hashCode → int
The hash code for this object.
no setterinherited
hasListener → bool
Whether there is a subscriber on the Stream.
no setterinherited
isBroadcast → bool
Whether this stream is a broadcast stream.
no setterinherited
isClosed → bool
Whether the stream controller is closed for adding more events.
no setterinherited
isEmpty → Future<bool>
Whether this stream contains any elements.
no setterinherited
isEmpty → bool?

Available on Observable<String?>, provided by the ObservablenStringExt extension

Returns true if this string is empty.
no setter
isEmpty → bool

Available on Observable<String>, provided by the ObservableStringExt extension

Returns true if this string is empty.
no setter
isNotEmpty → bool?

Available on Observable<String?>, provided by the ObservablenStringExt extension

Returns true if this string is not empty.
no setter
isNotEmpty → bool

Available on Observable<String>, provided by the ObservableStringExt extension

Returns true if this string is not empty.
no setter
isPaused → bool
Whether the subscription would need to buffer events.
no setterinherited
last → Future<String?>
The last element of this stream.
no setterinherited
length → Future<int>
The number of elements in this stream.
no setterinherited
notifyOnlyIfChanged → bool
If true, listeners will be notified if new value not equals to old value Default true
finalinherited
onCancel ↔ ControllerCancelCallback?
The callback which is called when the stream is canceled.
getter/setter pairinherited
onListen ↔ ControllerCallback?
The callback which is called when the stream is listened to.
getter/setter pairinherited
onPause ↔ ControllerCallback
The callback which is called when the stream is paused.
getter/setter pairinherited
onResume ↔ ControllerCallback
The callback which is called when the stream is resumed.
getter/setter pairinherited
runes → Runes?

Available on Observable<String?>, provided by the ObservablenStringExt extension

Returns an Iterable of Unicode code-points of this string.
no setter
runes → Runes

Available on Observable<String>, provided by the ObservableStringExt extension

Returns an Iterable of Unicode code-points of this string.
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
single → Future<String?>
The single element of this stream.
no setterinherited
sink → StreamSink<String?>
Returns a view of this object that only exposes the StreamSink interface.
no setterinherited
stackTrace → StackTrace?
Returns StackTrace of the last emitted error.
no setterinherited
stream → StreamWithValue<String?>
The stream that this controller is controlling.
no setterinherited
value ↔ String?
Returns the last emitted value or initial value.
getter/setter pairinherited

Methods

add(String? event) → void
Sends a data event.
inherited
addError(Object error, [StackTrace? stackTrace]) → void
Sends or enqueues an error event.
inherited
addStream(Stream<String?> source, {bool? cancelOnError}) → Future<void>
Receives events from source and puts them into this controller's stream.
inherited
allMatches(String string, [int start = 0]) → Iterable<Match>

Available on Observable<String>, provided by the ObservableStringExt extension

allMatches(String string, [int start = 0]) → Iterable<Match>?

Available on Observable<String?>, provided by the ObservablenStringExt extension

allMatches(String string, [int start = 0]) → Iterable<Match>
Matches this pattern against the string repeatedly.
override
any(bool test(String? element)) → Future<bool>
Checks whether test accepts any element provided by this stream.
inherited
asBroadcastStream({void onListen(StreamSubscription<String?> subscription)?, void onCancel(StreamSubscription<String?> subscription)?}) → Stream<String?>
Returns a multi-subscription stream that produces the same events as this.
inherited
asyncExpand<E>(Stream<E>? convert(String? event)) → Stream<E>
Transforms each element into a sequence of asynchronous events.
inherited
asyncMap<E>(FutureOr<E> convert(String? event)) → Stream<E>
Creates a new stream with each data event of this stream asynchronously mapped to a new event.
inherited
call() → String?
inherited
cast<R>() → Stream<R>
Adapt this stream to be a Stream<R>.
inherited
close() → Future
Closes the stream.
inherited
compareTo(String other) → int
Compares this object to another object.
override
compareTo(String other) → int

Available on Observable<String>, provided by the ObservableStringExt extension

compareTo(String other) → int?

Available on Observable<String?>, provided by the ObservablenStringExt extension

contains(Object? needle) → Future<bool>
Returns whether needle occurs in the elements provided by this stream.
inherited
contains(Pattern other, [int startIndex = 0]) → bool?

Available on Observable<String?>, provided by the ObservablenStringExt extension

Returns true if this string contains a match of other:
contains(Pattern other, [int startIndex = 0]) → bool

Available on Observable<String>, provided by the ObservableStringExt extension

Returns true if this string contains a match of other:
dispose() → void
Same as close, for IDisposable compatibility
inherited
distinct([bool equals(String? previous, String? next)?]) → Stream<String?>
Skips data events if they are equal to the previous data event.
inherited
drain<E>([E? futureValue]) → Future<E>
Discards all data on this stream, but signals when it is done or an error occurred.
inherited
elementAt(int index) → Future<String?>
Returns the value of the indexth data event of this stream.
inherited
endsWith(String other) → bool

Available on Observable<String>, provided by the ObservableStringExt extension

Returns true if this string ends with other. For example:
endsWith(String other) → bool?

Available on Observable<String?>, provided by the ObservablenStringExt extension

Returns true if this string ends with other. For example:
every(bool test(String? element)) → Future<bool>
Checks whether test accepts all elements provided by this stream.
inherited
expand<S>(Iterable<S> convert(String? element)) → Stream<S>
Transforms each element of this stream into a sequence of elements.
inherited
firstWhere(bool test(String? element), {String? orElse()?}) → Future<String?>
Finds the first element of this stream matching test.
inherited
fold<S>(S initialValue, S combine(S previous, String? element)) → Future<S>
Combines a sequence of values by repeatedly applying combine.
inherited
forEach(void action(String? element)) → Future<void>
Executes action on each element of this stream.
inherited
handleError(Function onError, {bool test(dynamic error)?}) → Stream<String?>
Creates a wrapper Stream that intercepts some errors from this stream.
inherited
indexOf(Pattern pattern, [int start = 0]) → int

Available on Observable<String>, provided by the ObservableStringExt extension

Returns the position of the first match of pattern in this string
indexOf(Pattern pattern, [int start = 0]) → int?

Available on Observable<String?>, provided by the ObservablenStringExt extension

Returns the position of the first match of pattern in this string
join([String separator = ""]) → Future<String>
Combines the string representation of elements into a single string.
inherited
lastIndexOf(Pattern pattern, [int? start]) → int?

Available on Observable<String?>, provided by the ObservablenStringExt extension

Returns the starting position of the last match pattern in this string, searching backward starting at start, inclusive:
lastIndexOf(Pattern pattern, [int? start]) → int

Available on Observable<String>, provided by the ObservableStringExt extension

Returns the starting position of the last match pattern in this string, searching backward starting at start, inclusive:
lastWhere(bool test(String? element), {String? orElse()?}) → Future<String?>
Finds the last element in this stream matching test.
inherited
listen(void onData(String? value)?, {Function? onError, void onDone()?, bool? cancelOnError}) → StreamSubscription<String?>
Adds a subscription to this stream.
inherited
map<S>(S convert(String? event)) → Stream<S>
Transforms each element of this stream into a new stream event.
inherited
matchAsPrefix(String string, [int start = 0]) → Match?

Available on Observable<String>, provided by the ObservableStringExt extension

matchAsPrefix(String string, [int start = 0]) → Match?

Available on Observable<String?>, provided by the ObservablenStringExt extension

matchAsPrefix(String string, [int start = 0]) → Match?
Matches this pattern against the start of string.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
onAdd(String? event) → void
An extension point for sub-classes. Perform any side-effect / state management you need to here, rather than overriding the add method directly.
inherited
onAddError(Object error, [StackTrace? stackTrace]) → void
An extension point for sub-classes. Perform any side-effect / state management you need to here, rather than overriding the add method directly.
inherited
padLeft(int width, [String padding = ' ']) → String?

Available on Observable<String?>, provided by the ObservablenStringExt extension

Pads this string on the left if it is shorter than width.
padLeft(int width, [String padding = ' ']) → String

Available on Observable<String>, provided by the ObservableStringExt extension

Pads this string on the left if it is shorter than width.
padRight(int width, [String padding = ' ']) → String?

Available on Observable<String?>, provided by the ObservablenStringExt extension

Pads this string on the right if it is shorter than width. Return a new string that appends padding after this string one time for each position the length is less than width.
padRight(int width, [String padding = ' ']) → String

Available on Observable<String>, provided by the ObservableStringExt extension

Pads this string on the right if it is shorter than width. Return a new string that appends padding after this string one time for each position the length is less than width.
pipe(StreamConsumer<String?> streamConsumer) → Future
Pipes the events of this stream into streamConsumer.
inherited
reduce(String? combine(String? previous, String? element)) → Future<String?>
Combines a sequence of values by repeatedly applying combine.
inherited
refresh() → void
Triggers stream to send current value again to force listeners
inherited
replaceAll(Pattern from, String replace) → String?

Available on Observable<String?>, provided by the ObservablenStringExt extension

Replaces all substrings that match from with replace.
replaceAll(Pattern from, String replace) → String

Available on Observable<String>, provided by the ObservableStringExt extension

Replaces all substrings that match from with replace.
setError(Object error, StackTrace? stackTrace) → void
inherited
singleWhere(bool test(String? element), {String? orElse()?}) → Future<String?>
Finds the single element in this stream matching test.
inherited
skip(int count) → Stream<String?>
Skips the first count data events from this stream.
inherited
skipWhile(bool test(String? element)) → Stream<String?>
Skip data events from this stream while they are matched by test.
inherited
split(Pattern pattern) → List<String>?

Available on Observable<String?>, provided by the ObservablenStringExt extension

Splits the string at matches of pattern and returns a list of substrings.
split(Pattern pattern) → List<String>

Available on Observable<String>, provided by the ObservableStringExt extension

Splits the string at matches of pattern and returns a list of substrings.
startsWith(Pattern pattern, [int index = 0]) → bool

Available on Observable<String>, provided by the ObservableStringExt extension

Returns true if this string starts with a match of pattern.
startsWith(Pattern pattern, [int index = 0]) → bool?

Available on Observable<String?>, provided by the ObservablenStringExt extension

Returns true if this string starts with a match of pattern.
substring(int startIndex, [int? endIndex]) → String

Available on Observable<String>, provided by the ObservableStringExt extension

Returns the substring of this string that extends from startIndex, inclusive, to endIndex, exclusive
substring(int startIndex, [int? endIndex]) → String?

Available on Observable<String?>, provided by the ObservablenStringExt extension

Returns the substring of this string that extends from startIndex, inclusive, to endIndex, exclusive
take(int count) → Stream<String?>
Provides at most the first count data events of this stream.
inherited
takeWhile(bool test(String? element)) → Stream<String?>
Forwards data events while test is successful.
inherited
timeout(Duration timeLimit, {void onTimeout(EventSink<String?> sink)?}) → Stream<String?>
Creates a new stream with the same events as this stream.
inherited
toList() → Future<List<String?>>
Collects all elements of this stream in a List.
inherited
toLowerCase() → String

Available on Observable<String>, provided by the ObservableStringExt extension

Converts all characters in this string to lower case. If the string is already in all lower case, this method returns this.
toLowerCase() → String?

Available on Observable<String?>, provided by the ObservablenStringExt extension

Converts all characters in this string to lower case. If the string is already in all lower case, this method returns this.
toSet() → Future<Set<String?>>
Collects the data of this stream in a Set.
inherited
toString() → String
A string representation of this object.
inherited
toUpperCase() → String

Available on Observable<String>, provided by the ObservableStringExt extension

Converts all characters in this string to upper case. If the string is already in all upper case, this method returns this.
toUpperCase() → String?

Available on Observable<String?>, provided by the ObservablenStringExt extension

Converts all characters in this string to upper case. If the string is already in all upper case, this method returns this.
transform<S>(StreamTransformer<String?, S> streamTransformer) → Stream<S>
Applies streamTransformer to this stream.
inherited
trim() → String

Available on Observable<String>, provided by the ObservableStringExt extension

Returns the string without any leading and trailing whitespace.
trim() → String?

Available on Observable<String?>, provided by the ObservablenStringExt extension

Returns the string without any leading and trailing whitespace.
trimLeft() → String

Available on Observable<String>, provided by the ObservableStringExt extension

Returns the string without any leading whitespace.
trimLeft() → String?

Available on Observable<String?>, provided by the ObservablenStringExt extension

Returns the string without any leading whitespace.
trimRight() → String?

Available on Observable<String?>, provided by the ObservablenStringExt extension

Returns the string without any trailing whitespace.
trimRight() → String

Available on Observable<String>, provided by the ObservableStringExt extension

Returns the string without any trailing whitespace.
where(bool test(String? event)) → Stream<String?>
Creates a new stream from this stream that discards some elements.
inherited

Operators

operator +(String val) → String

Available on Observable<String?>, provided by the ObservablenStringExt extension

operator +(String val) → String

Available on Observable<String>, provided by the ObservableStringExt extension

operator ==(Object other) → bool
The equality operator.
inherited