Jahidul007 / Flutter_Roadmap

  ├── lib
  |   ├── posts
  │   │   ├── bloc
  │   │   │   └── post_bloc.dart
  |   |   |   └── post_event.dart
  |   |   |   └── post_state.dart
  |   |   └── models
  |   |   |   └── models.dart*
  |   |   |   └── post.dart
  │   │   └── view
  │   │   |   ├── posts_page.dart
  │   │   |   └── posts_list.dart
  |   |   |   └── view.dart*
  |   |   └── widgets
  |   |   |   └── bottom_loader.dart
  |   |   |   └── post_list_item.dart
  |   |   |   └── widgets.dart*
  │   │   ├── posts.dart*
  │   ├── app.dart
  │   ├── simple_bloc_observer.dart
  │   └── main.dart
  ├── pubspec.lock
  ├── pubspec.yaml

var dateFormat = DateFormat("dd-MM-yyyy hh:mm aa"); // you can change the format here
var utcDate = dateFormat.format(DateTime.parse(uTCTime)); // pass the UTC time here
var localDate = dateFormat.parse(utcDate, true).toLocal().toString();
String createdDate = dateFormat.format(DateTime.parse(localDate)); 

List<String> _options = [
 'Arts & entertainment',
 'Biographies & memoirs',
];

List<bool> _isOptionSelected = [
 false,
 false,
];



Map<String, dynamic> map =  _options.asMap().map((key,value)=>MapEntry(value,{
 'optionName':value,
 'isOptionSelected':_isOptionSelected[key]
}));

List<String> _options = [];
 List<bool> _isOptionSelected = [];
 Map<String, Map<String, dynamic>> _isOptionMap = {
   'Arts & entertainment': {
     'optionName': 'Arts & entertainment',
     'isOptionSelected': false,
   },
   'Biographies & memoirs': {
     'optionName': 'Biographies & memoirs',
     'isOptionSelected': false,
   },
 };
 _isOptionMap.forEach((key, value) {
     _options.add(value['optionName']);
     _isOptionSelected.add(value['isOptionSelected']);
   
 });
 print(_options);
 print(_isOptionSelected);

TextEditingController _controller = new TextEditingController();
String text = ""; // empty string to carry what was there before it 
onChanged
int maxLength = ...
...
new TextField(
 controller: _controller,
 onChange: (String newVal) {
     if(newVal.length <= maxLength){
         text = newVal;
     }else{
         _controller.value = new TextEditingValue(
             text: text,
             selection: new TextSelection(
                 baseOffset: maxLength,
                 extentOffset: maxLength,
                 affinity: TextAffinity.downstream,
                 isDirectional: false
             ),
             composing: new TextRange(
                 start: 0, end: maxLength
             )
         );
         _controller.text = text;
     } 
 }
);

DateTimePicker(
                   type: DateTimePickerType.dateTimeSeparate,
                   dateMask: 'yyyy-MM-dd',
                   initialValue: DateTime.now().toString(),
                   firstDate: DateTime(2000),
                   lastDate: DateTime(2100),
                   icon: Icon(Icons.event),
                   dateLabelText: 'Date',
                   timeLabelText: "Hour",

                   onChanged: (val) {
                     var date = val.substring(0,10);
                     var time = val.substring(11);
                     reportBloc.updateFromDate(date+"T"+time+":00.000Z");
                   },
                   validator: (val) {
                     return null;
                   },
                   onSaved: (val) {
                     reportBloc.updateFromDate(val);
                   },
                 ),

WidgetsBinding.instance.addPostFrameCallback((_) async {
   await showDialog(
     context: context,
     builder: (BuildContext context) => AnimatedPadding(
       padding: MediaQuery.of(context).viewInsets,
       duration: const Duration(milliseconds: 100),
       curve: Curves.decelerate,
       child: LoadingWrap(
         padding: EdgeInsets.all(20),
         children: [
           new AlertDialog(
             insetPadding: EdgeInsets.all(20),
             contentPadding: EdgeInsets.all(0),
             content: Container(
               height: 200,
               width: MediaQuery.of(context).size.width,
               child: SingleChildScrollView(
                 child: ListBody(
                   children: <Widget>[
                    -------------
                         ],
                       ),
                     ),
                   ],
                 ),
               ),
             ),
             actions: <Widget>[],
           )
         ],
       ),
     ),
   );
 });

GestureDetector(
         onTap: () {
           final dynamic _toolTip = _toolTipKey.currentState;
           _toolTip.ensureTooltipVisible();
         },
         child: Tooltip(
           key: _toolTipKey,
           waitDuration: Duration(seconds: 1),
           showDuration: Duration(seconds: 2),
           padding: EdgeInsets.all(5),
           height: 16,
           message: widget.message??"testing tooltip",
           child: SvgPicture.asset("images/ic_info.svg"),),
       ),
     ],),
   )
   

//flutter_masked_text: ^0.8.0
import 'package:flutter_masked_text/flutter_masked_text.dart';

String getPhoneNumber(String phoneNum)  {
 var controller = new MaskedTextController(text: '', mask: '000-0000');
 controller.updateText(phoneNum);
 return controller.text.length >=1 ?"1-868-"+controller.text:"Not Available";
}

balanceTransferDescription
         .where((element) => element.name.toLowerCase().contains("other"))
         .forEach((element) {
       balanceTransferDescription.remove(element);
       balanceTransferDescription.insert(
           balanceTransferDescription.length, element);

String capitalizeSentence(String s) {
  // Each sentence becomes an array element
  var sentences = s.split('.');
  // Initialize string as empty string
  var output = '';
  // Loop through each sentence
  for (var sen in sentences) {
    // Trim leading and trailing whitespace
    var trimmed = sen.trim();
    // Capitalize first letter of current sentence
    var capitalized = "${trimmed[0].toUpperCase() + trimmed.substring(1)}";
    // Add current sentence to output with a period
    output += capitalized + ". ";
  }
  return output;
}

String s = "Hello, world![1] i am 'foo' [100]";
print(s.replaceAll(new RegExp(r'\s*\[\d+]'),''));

import 'dart:collection';

void main() {
  List users = [
    {"userEmail": "[email protected]"},
    {"userEmail": "[email protected]"},
    {"userEmail": "[email protected]"},
    {"userEmail": "[email protected]"},
    {"userEmail": "[email protected]"},
  ];

  var finalList = [
    ...LinkedHashSet(
      equals: (user1, user2) => user1['userEmail'] == user2['userEmail'],
      hashCode: (user) => user['userEmail'].hashCode,
    )..addAll(users)
  ];
  print(finalList);
}

// define theme
theme: ThemeData(
          primaryColor: Colors.black,
          colorScheme: ColorScheme.fromSwatch().copyWith(
            secondary: Colors.green,
          ),
        ),
 // call color 
 color: Theme.of(context).colorScheme.secondary

  List l1 = [1, 2, 3, 4];
  List l2 = [1, 2, 3, 4];
  print(identical(l1.toString(), l2.toString())); //true

import 'package:flutter/foundation.dart';
void main() {
  List<int> l1 = [1, 2, 3,4];
  List<int> l2 = [1, 2, 3, 4];
  print(listEquals(l1, l2)); //true
}