1.
Haim Michael
October 9th, 2013
All logos, trade marks and brand names used in this presentation belong
to the respective owners.
Watch the lecture at http://youtu.be/4g3U6MZc92Q
LifeMichael.com
Dart Jump Start

2.
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Introduction
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Optional Typing
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Object Oriented Programming
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Functional Programming
●
JavaScript Interoperability
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Dart Packages Manager
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Dart Evolution
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Dart Criticism
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Learning Resources
●
Questions & Answers
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Table of Content

3.
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Dart is an open source class based, object oriented,
optionally typed programming language that assists us
with the development of browser based one page web
applications.
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We can execute the code that should run on the client
side either by using a web browser that supports Dart or
by compiling our code into JavaScript.
LifeMichael.com
Introduction

4.
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We can execute our code on the server side by using the
Dart virtual machine.
●
The syntax seems familiar both to those who are used to
JavaScript and to those who are used to JavaPHPC#.
LifeMichael.com
Introduction

5.
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The Dart programming language bridges the gap between the
JavaScript dynamic type system and the JavaC# static one.
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The optional typing is available in variable declarations, function
parameters definitions and function return types.
void main()
{
int a = 4;
int b = 3;
var temp = a + b;
print("temp=$temp");
}
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Optional Typing

6.
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The Dart programming language uses classes and interfaces
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similarly to Java, C# and PHP.
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Dart supports single inheritance similarly to Java, C# and PHP.
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Dart supports multiple interfaces implementation similarly to
Java, C# and PHP.
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Similarly to Java, PHP and C# every class inherits (either
directly or indirectly) from the Object class.
LifeMichael.com
Object Oriented Programming

7.
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The classes can have public and private members. The
public accessibility is the default one.
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Dart supports a special shorthand syntax for accessing
class properties, similarly to properties in C#
LifeMichael.com
Object Oriented Programming

8.
class Rectangle
{
double _width;
double _height;
Rectangle(double w,double h)
{
width = w;
height = h;
}
get width => _width;
set width(size) => (size>0)?_width=size:_width=10.0;
get height => _height;
set height(size) => (size>0)?_height=size:_height=10.0;
area() => width * height;
perimeter() => 2*(width+height);
}
LifeMichael.com
Object Oriented Programming

9.
main()
{
var ob = new Rectangle(3.2,4.4);
ob.width = 20.2;
ob.height = -4.1;
var area = ob.area();
print("area is $area");
}
LifeMichael.com
Object Oriented Programming

10.
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We can pass a function as an argument to another
function and we can assign a function to a variable.
●
The possibility to define anonymous functions and pass
them over as arguments to other functions simplifies the
code.
LifeMichael.com
Functional Programming

11.
goodMorning(str) => print("Good Morning $str");
goodEvening(str) => print("Good Evening $str");
loop(func,name)
{
for(var i=1;i<=3;i++)
{
func(name);
}
}
main()
{
var myFunc = goodEvening;
loop(myFunc,"Danidin");
}
LifeMichael.com
Functional Programming

12.
●
Dart allows us to interact with other parts of the web
document as the DOM and other code written in
JavaScript.
LifeMichael.com
JavaScript Interoperability

13.
import 'dart:html';
void main() {
var ob = query("#sample_text_id");
ob.text = "Press Here";
ob.on.click.add(reverseText);
}
void reverseText(Event event) {
var text = query("#sample_text_id").text;
var buffer = new StringBuffer();
for (int i = text.length - 1; i >= 0; i--) {
buffer.add(text[i]);
}
query("#sample_text_id").text = buffer.toString();
}
LifeMichael.com
JavaScript Interoperability

14.
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Pub is Dart package manager. Pub assists us reusing
existing Dart code.
●
Pub handles versioning and dependency management
and ensures that our application runs on other machines
exactly as it runs on ours.
http://pub.dartlang.org
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Dart Package Manager

15.
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Dart was announced on October 12th 2011. The
developers of Dart seem to learn well from Java
mistakes (waiting with the production release, proper
development tools and neutralizing competitors).
●
During the past two years its development goes side by
side with the development of new Google powered
JavaScript libraries, such as AngularJS and Polymer.
Polymer
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Dart Evolution

16.
“The growth of Dart might take us backward to the days
of proprietary vendor lock-in"
“There is a fragmentation risk in the evolution of a new
non standard programming language for the web"
“The optional typing damages the quality of the code"
Critics I Found on The Web
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Dart Criticism

17.
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Dart programming language official main website
https://www.dartlang.org
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You can find the 'Dart Fundamentals' online course
available for free personal use at
http://abelski.lifemichael.com
●
Dart Developers Group on Facebook
https://www.facebook.com/groups/221793191216903/
LifeMichael.com
Learning Resources

18.
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Two courses you might find interesting include
Software Engineering in PHP
more info
Android 4.4 Java Applications Development
more info
HTML5 Cross Platform Mobile Applications
more info
●
If you enjoyed my lecture please leave me a comment
at http://speakerpedia.com/speakers/life-michael.
Thanks for your time!
Haim.
LifeMichael.com
Questions & Answers