Macos installation

brew tap dart-lang/dart
brew install dart --with-content-shell --with-dartium

Updating

brew update
brew upgrade dart
brew cleanup dart

Flutter

See here to install.

git clone -b alpha https://github.com/flutter/flutter.git
export PATH=`pwd`/flutter/bin:$PATH
flutter doctor
int fib(int n) => (n > 2) ? (fib(n - 1) + fib(n - 2)) : 1;

void main() {
  print('fib(20) = ${fib(20)}');
}

https://www.youtube.com/watch?v=OLjyCy-7U2U

http://www.newthinktank.com/2015/09/learn-dart-one-video/

A two part Flutter overview:

Some nice Medium posts on Flutter