Future<dynamic>Future.value([FutureOr<dynamic>?value]) Call the future String using await function that returns String. Here is a code: import'dart:async';voidmain()async{Future<String> stringFuture=_getMockData();Stringmessage=awaitstringFuture;print(message);// will print one on console.}F...
How to fix “Converting object to an encodable object failed: ” Instance of ‘Options’ exception in Dart/Flutter? import'package:flutter/cupertino.dart'; classOptions with ChangeNotifier{ String key; String point; bool checked; Options({this.key,this.point,this.checked}); MaptoJson()=>{ '...
下面是我封装的方法,方便插入和更新数据。 static String getInsertSql(String table, Map<String, dynamic> values, {List<String> ignores}) { if (ignores != null && ignores.length > 0) { ignores = ignores.map((e) => e.toLowerCase()).toList(); } final insert = StringBuffer(); insert....
toList() as T; } else if (<String, String>{} is T && output is Map<dynamic, dynamic>) { return output.map<String, String>((dynamic key, dynamic value) => MapEntry<String, String>(key.toString(), value.toString())) as T; } else if (const TestMode() is T && output is ...
fromJson(Map<String, dynamic> json) => _$SecurityAndAnalysisFromJson(json); Map<String, dynamic> toJson() => _$SecurityAndAnalysisToJson(this); } About A one-line command to convert a JSON file into a Dart model class. pub.dev/packages/json5_model Topics dart json flutter json5 ...
toJson(); //2. 使用顶级函数 Use top-level functions Map<String, dynamic> data = documentSerialize(doc); final json = jsonEncode(data); Map<String, dynamic> dataNode = documentNodeSerialize(node); final jsonNode = jsonEncode(dataNode); 反序列化数据 Deserialize node/document data import '...