keytool -genkey -v -keystore c:\Users\YOUR_USER_NAME\upload-keystore.jks -storetype JKS -keyalg RSA -keysize 2048 -validity 10000 -alias upload

storePassword=<password from previous step>
keyPassword=<password from previous step>
keyAlias=upload
storeFile=<location of the key store file, such as /Users/<user name>/upload-keystore.jks>

   def keystoreProperties = new Properties()
   def keystorePropertiesFile = rootProject.file('key.properties')
   if (keystorePropertiesFile.exists()) {
       keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
   }

   android {
         ...
   }

   signingConfigs {
       release {
           keyAlias keystoreProperties['keyAlias']
           keyPassword keystoreProperties['keyPassword']
           storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
           storePassword keystoreProperties['storePassword']
       }
   }
   buildTypes {
       release {
           signingConfig signingConfigs.release
       }
   }

flutter build appbundle

class NickNames { ... }

class HttpRequest { ... }

typedef Predicate<T> = bool Function(T value);

class Foo {
  const Foo([Object? arg]);
}

Foo(anArg)
class A { ... }

extension MyFancyList<T> on List<T> { ... }

extension SmartIterable<T> on Iterable<T> { ... }

library peg_parser.source_scanner;

import 'file_system.dart';
import 'slider_menu.dart';

 
const foo = Foo(); 

var count = 3;

HttpRequest httpRequest;

void align(bool clearItems) {
  // ...
}

const pi = 3.14;
const defaultTimeout = 1000;
final urlScheme = RegExp('^([a-z]+):');

class Dice {
  static final numberGenerator = Random();
}

import 'src/error.dart';
import 'src/foo_bar.dart';

export 'src/error.dart';

// When you have an if statement with no else clause and the whole if statement fits on one line, you can omit the braces if you prefer:
if (arg == null) return defaultValue;

/****BUT****/

// If the body wraps to the next line, though, use braces!!

if (overflowChars != other.overflowChars) {
  return overflowChars < other.overflowChars;
}

import 'src/stuff.dart';
import 'src/utils.dart';

import '../api.dart';
import 'stuff.dart';

import 'package:my_package/api.dart'; // Don't reach into 'lib'.
import 'test_utils.dart'; // Relative within 'test' is fine.

int a = null; // INVALID in null-safe Dart.

int? a = null; // Valid in null-safe Dart.

int? a; // The initial value of a is null.

int? a; // = null
a ??= 3;
print(a); // <-- Prints 3.

a ??= 5;
print(a); // <-- Still prints 3.

print(1 ?? 3); // <-- Prints 1.
print(null ?? 12); // <-- Prints 12.

(myObject != null) ? myObject.someProperty : null

myObject?.someProperty // Üstteki ifadenin kısaltılmış hali eğer my.Object null değilse myObject.someProperty döndürür

myObject?.someProperty?.someMethod() // 2 nesne de null değilse someMeyhod döndürülür

final aListOfStrings = ['a', 'b', 'c'];
final aSetOfInts = {3, 4, 5};
final aMapOfStringsToInts = {
  'one': 1,
  'two': 2,
  'three': 3,
}

final aListOfInts = <int>[];
final aSetOfInts = <int>{};
final aMapOfIntToDouble = <int, double>{};

// Assign this a map of String to int so that aMapOfStringsToInts['myKey'] returns 12:
final aMapOfStringsToInts = {'myKey': 12};

//Writing the list on the screen
for(var product in profucts){
    print(product);
}

//
Student selectedStudent = Student.withId(0,"","",0);

Function f1 =(int a, int b){
int toplam =a + b;
print(toplam); }

var dictionary1 = new Map();
dictionary1["book"] = "kitap";

var dictionary1 ={"kitap":"book"};
//kitap=key
//delete
dictionary1.remove("book");