smartherd / darttutorial

Learn Dart Programming, its basics and Fundamentals from scratch.

Dart Programming Tutorial for Beginners

Learn Dart Programming, its basics and Fundamentals from scratch.

Topics to be covered

0. Overview
   • Course introduction, prequisites and software required
1. Installation
   • Install required softwares for Windows, MAC and Linux ( Ubuntu )
2. Getting Started with Dart Programming
   • Run your first app in Dart
   • Comments
3. Exploring Data Types and Variables
   • Data Types and Variables
   • String, Literals and String Interpolation
   • Define constants using "final" and "const" keywords
4. Control Flow Statements
   • IF ELSE
   • Conditional Expressions
   • Ternary Operator
5. Loop Control Statements
   • What are Iterators?
   • FOR Loop and how it works
   • WHILE Loop
   • DO WHILE Loop
   • BREAK statements
   • CONTINUE keyword
   • Labelled FOR Loop
6. Exploring Functions or Methods
   • Declaring functions
   • Function Expressions: Short hand syntax or using FAT ARROR
   • Optional Positional Parameters
   • Optional Named Parameters
   • Optional Default Parameters
7. Exception Handling
   • Demo with example
   • Custom Exception Class
8. Object Oriented Programming: Getting Started
   • Defining Class and creating Objects
   • Instance and field variables
   • Constructors
     • Default
     • Named
     • Parameterized
9. More on Object Oriented Dart
   • Inheritance
   • Getter and Setter
   • Private Instance Variable
   • Polymorphism
   • Using constructors in Inheritance
   • Static variables and methods
10. Functional Programming in Dart
    • Lambda Expression
    • Higher-Order Functions
    • Lexical Closures
11. Dart Collections
    • Arrays or List
      • Fixed Length List
      • Growable List
    • Set and HashSet
    • Map and HashMap
12. Callable Classes
13. Conclusion

Authors

• Sriyank Siddhartha

darttutorial's Issues

String issue in online complier

When I use String keyword to declared name without Initialize with value it's show me error, but when I used var instead of String it's work fine.

How can I use switch statement to change listview colors

here is the code .i need help in switch case. I watched this video but I need more examples to completely understand switch case..

How can i use switch case to change bg color of listview .I want to add 10 different types of colors in listview

ListView.builder(
  itemBuilder: (BuildContext context, int index) {
    return Container(
      color: (index % 10 == 0) ? Colors.red : Colors.green,
      child: ListTile(
        title: ...
      ),
    );
  },
)

Learn dart

dart pdf

I have make a pdf on dart if you want i can attach and make a pull request if yes reply to me
thanks

Outdated Issues

Error in Fixed-Length List Declaration:

The fixed-length list is declared incorrectly, leading to a compilation error.

List numbersList = List(5); // This line causes an error

Error: The class 'List' doesn't have an unnamed constructor.

Proposed Fix: Replace it with List<int?> numbersList = List<int?>.filled(5, null);.

Error in For-Each Loop:

There's a type mismatch in the for-each loop due to the use of nullable integers.

for (int element in numbersList) { // This line causes a type mismatch error
  print(element);
}

Proposed Fix: Change it to for (int? element in numbersList) {

Current Version of Dart SDK : 3.2.5 / 17 January 2024

Migrate Project

Hello Sir! I am importing this project but getting errors I am just wanted to ask what is the solution for these errors one of them is not resolving pubspec.ymal file..........
Warning: You are using these overridden dependencies:
! flutter_web 0.0.0 from git https://github.com/flutter/flutter_web at c04fb5 in packages/flutter_web
! flutter_web_ui 0.0.0 from git https://github.com/flutter/flutter_web at c04fb5 in packages/flutter_web_ui

Return Type issue

I found my interest in this repo so I just download it and open it into VSCode and found some error like
e.i. in 17_default_parameters has a function
int findVolume(int length, {int breadth = 2, int height = 20}) {
print("Lenght is $length");
print("Breadth is $breadth");
print("Height is $height");

print("Volume is ${length * breadth * height}");
}
this function doesn't return an integer value although the type is int.
Correct me If I did any mistake from my side.

Thank You

Most of the tutorial is outdated

I just started with dart but it seems that this tutorial is outdated and the most recent dart version has
groundbreaking changes that break backwards compatibility.

this is from 21_getters_setters for example:

class Student {

  String name; // Non-nullable instance field 'name' must be initialized.

  double _percent; // Non-nullable instance field '_percent' must be initialized.

  void set percentage(double marksSecured) => _percent = (marksSecured / 500) * 100;

  double get percentage => _percent;
}

I copied the errors that dartpad.dev gave me, into the code above as comments.

both the name and _percent fields have to be initialized now. it's saying about non-nullable types,
I'm pretty sure I read somewhere that every type in dart is an object and therefore set to null when initialized without a value.