katana library Null safety
This package contains utility classes such as the Masamune package.
To use, import package:katana/katana.dart.
Classes
- Api
- Provides static methods for making HTTP requests.
- DateDuration
- A class that represents a date period.
- DateFormat
- DateFormat is for formatting and parsing dates in a locale-sensitive manner.
- Immutable
- Used to annotate a class.
- Required
-
Used to annotate a named parameter
pin a method or functionf.
Extensions
- DateTimeExtensions
- Provides extended methods for DateTime.
- DateTimeIterableExtensions
- Provides extended methods for DateTime arrays.
- DoubleExtensions
- Provides extended methods for double.
- DoubleIterableExtensions
- Provides extended methods for double arrays.
- DurationExtensions
- Provides extended methods for Duration.
- DynamicMapExtensions
- Provides extended methods for DynamicMap.
- InterableOfIterableExtensions
- Provides extended methods for Iterable arrays.
- IntExtensions
- Provides extended methods for int.
- IntIterableExtensions
- Provides extended methods for int arrays.
- IterableExtensions
-
Provides extended methods for
Tarrays. - JsonDynamicListExtensions
- Provides Json extension methods for DynamicList.
- JsonDynamicMapExtensions
- Provides Json extension methods for DynamicMap.
- ListExtensions
-
Provides extended methods for List in
T. - MapExtensions
- Provides extended methods for Map.
- NullableDoubleExtensions
- Provides an extension method for double that is nullable.
- NullableIntExtensions
- Provides an extension method for int that is nullable.
- NullableIterableExtensions
- Provides an extension method for Iterable that is nullable.
- NullableListExtensions
- Provides an extension method for List that is nullable.
- NullableMapExtensions
- Provides an extension method for Map that is nullable.
- NullableNumExtensions
- Provides an extension method for num that is nullable.
- NullableObjectExtensions
- Provides an extension method for List that is nullable.
- NullableSetExtensions
- Provides an extension method for Set that is nullable.
- NullableStringExtensions
- Provides an extension method for String that is nullable.
- NullableValueIterableExtensions
- Provides an extension method for Iterable whose value is nullable.
- RandomExtensions
- Provides extended methods for Random.
- SetExtensions
- Provides extended methods for Set.
- StringExtensions
- Provides extended methods for String.
Constants
- nullOfBool → const bool?
-
A
nullobject with a defined type of bool?null - nullOfDouble → const double?
-
A
nullobject with a defined type of double?null - nullOfDynamicList → const DynamicList?
-
A
nullobject with a defined type of DynamicList?null - nullOfDynamicMap → const DynamicMap?
-
A
nullobject with a defined type of DynamicMap?null - nullOfInt → const int?
-
A
nullobject with a defined type of int?null - nullOfNum → const num?
-
A
nullobject with a defined type of num?null - nullOfString → const String?
-
A
nullobject with a defined type of String?null - zeroOfNum → const num
-
A
0object with a defined type of num?0
Properties
- sprintf ↔ PrintFormat
-
read / write
- uuid → String
-
Generate and retrieve the UUID for Version 4.
read-only
Functions
-
generateCode(
int length, {int seed = 0, String charSet = "23456789abcdefghjkmnpqrstuvwxy"}) → String -
Generates and returns a random string with the number of characters given by
length. -
initializeDateFormatting(
[String? locale, String? ignored]) → Future< void> -
This should be called for at least one
localebefore any date formatting methods are called. It sets up the lookup for date symbols. Both thelocaleandignoredparameter are ignored, as the data for all locales is directly available. -
jsonDecodeAsList<
T extends Object?> (String json, [List< T> defaultValue = const []]) → List<T> -
Converts
jsonto a Json-decoded List -
jsonDecodeAsMap<
T extends Object?> (String json, [Map< String, T> defaultValue = const {}]) → Map<String, T> -
Converts
jsonto a Json-decoded Map<String, dynamic> object. -
jsonEncodable(
Object? o) → bool -
If this object is Json encodable,
trueis returned. -
nullOfList<
T> () → List< T> ? -
A
nullobject with a defined type of List<T>? -
nullOfMap<
K, V> () → Map< K, V> ? -
A
nullobject with a defined type of Map<K, V>? -
nullOfSet<
T> () → Set< T> ? -
A
nullobject with a defined type of Set<T>? -
wait(
Iterable futures) → Future< void> -
Wait until all Futures given in
futuresare completed.
Typedefs
- ApiResponse = Response
- An HTTP response where the entire response body is known in advance.
- ApiResquest = Request
- An HTTP request where the entire request body is known in advance.
- DynamicList = List
- Represents the type of List<dynamic>.
-
DynamicMap
= Map<
String, dynamic> - Represents the type of Map<String, dynamic>.