dart sample

sample.dart

main(){
  var xxx = {'one':1, "two":2}; // key must be string.
  print(xxx["one"]); // NG : xxx.one
  print(xxx['two']);

  var a,b=100;
  final f = 20;
  print(a);
  print(b);
  // f = 100; // error

  twice(var n) => n * 2;
  twice2(var n){
    n * 2;
  }

  print(twice2(12));
  for(int i=0,imax=5;i<imax;i++){
    print("i = ${i}");
  }

  final greet_world = (String greeting) => 
    print(greeting + ', world!');

  greet_world('Hi.');

  final make_add_n = (int n) => (int m) => m + n;
  var _make_add_n = make_add_n(1);
  print(_make_add_n);
  print(_make_add_n(10));
}