Gain insights into Dart's object-oriented features, explore extensions, enums, mixins, and asynchronous programming. Discover hands-on code practice to confidently apply Dart in your projects.

dart.tar.gz

dart2_7

Dart is a fully object-oriented, class-based, simple, and clean language. Google’s popular mobile framework, Flutter uses Dart language to implement high-quality native applications, so it’s recommended that you understand Flutter before beginning this course.

In this course, you will dive deep into Dart 2 language features while using interactive hands-on code playgrounds. This course will help you become confident with Dart extensions, enums, mixins, generics, libraries, asynchronous programming, class variables, callable classes, and generator functions.

By the end of this course, you will have a strong understanding of Dart principles, and you’ll be ready to start using this powerful language in your own projects.

Developing Web Applications with Dart

Add a method in every class of the project that can append the suffix.

Create a separate utility class and use `static` functions to append the suffix.

Write an extension method on the core [`String`](https://api.dart.dev/stable/2.9.1/dart-core/String-class.html) class to append the desired suffix.

Assume that you want to append a suffix ‘_project1’ to all strings in your project. What solution would you pick?

Assume that you want to append a suffix ‘_project1’ to all strings in your project. What solution would you pick?

```dart
extension on String {
  String appendSuffix() => this + "_project1";
}
```

```dart
class Utility {
  static appendSuffix(String myString) {
    return myString + "_project1";
  }
}
```

```dart
extension MyString on String {
  String appendSuffix() => this + "_project1";
}
```

How would you write an extension method on a built-in `String` to append suffix “_project_1”? Select all that apply.

How would you write an extension method on a built-in <code>String</code> to append suffix “_project_1”? Select all that apply.

Which of the following outputs is correct for the following statement:
```dart
"Testing".appendSuffix("_project")
```
The extension definition:
```dart
extension on String {
  String appendSuffix(String suffix) => this + suffix;
}
```


Which of the following outputs is correct for the following statement:
<pre><code class="language-dart">&quot;Testing&quot;.appendSuffix(&quot;_project&quot;)
</code></pre>
The extension definition:
<pre><code class="language-dart">extension on String {
 String appendSuffix(String suffix) =&gt; this + suffix;
}
</code></pre>

Check your understanding of Dart extensions in this lesson.

Introduction

Dart Extensions

Dart Enums

Dart Mixins

Dart Generics

Dart Libraries

Asynchronous Programming In Dart

Miscellaneous

Next Steps

Quiz Yourself on Extensions