Dart: Another Tool in the Toolbox

Dart Another tool

in the toolbox

http://blog.sethladd.com/2013/09/forms-http-servers-and-polymer-with-dart.html

Client and ServerWe got both kinds, Client and Server!!!

Who uses dart• Google - Fiber, Apps, Election

• Netflix - Security Monkey, integration with AWS

• Soundtrap - Music Recording with browser and WebRTC

• Blossom - Lean project mgmt tool

• SonarDesign - where Jesse works! :)

How do I use it?• Run in Chromium Browser with DartVM

• Compile to javascript

Language Features

Data types• Num (base abstract type):

• int double (concrete types for num)

• String

• Bool

• List - no arrays !!

• Map

Bool• Unlike JavaScript, 1 is not true

• True is true

• Everything else is false

Strongly typed / Optionally typed

Interpolation

Classes

Private, Getters/Setters

Constructor

Methods - Positional Parameters• optional parameters specified with [ ]

• defaults with =

Methods - Named Parameters• named parameters specified with {}

• defaults with :

name (x) => expression

Shorthand function

Anonymous Function

FYI: fold is like inject/reduce in ruby

Use the shorthand syntax

Generics

Mixins

Functional

http://www.infoq.com/presentations/dart-introduction

Interfaces• Not strict, only warnings if you don't implement

all the methods

Dart VM Modes

• Checked - annotations (int, string, etc) throw exceptions if given invalid data

• Production - type annotations are ignored

Console Apps• import "dart:io"

• Can't use in web pages

• File operations

• synchronous

• asynchronous

Web Applications

demo