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real language
Bookmarking
Language Dart
(An object oriented version of the song.)
| Date: | 10/15/11 |
| Author: | Ville Saalo |
| URL: | http://netbooksandeverything.blogspot.com/ |
| Comments: | 0 |
| Info: | http://www.dartlang.org |
| Score: |  (2.75 in 4 votes) |
class BeerWall {
int _beers;
String _container;
BeerWall.withBeers(this._beers, [this._container = "bottle"]);
int get beers() => _beers;
String get container() => _container;
void takeBeer() {
if (_beers > 0) --_beers;
else throw "Go to the store and buy some more";
}
void set beers(int amount) {
if (amount == null) _beers = 0;
else if (amount < 0) throw "Cannot have a negative amount of ${container}s!";
_beers = amount;
}
}
class Singer {
BeerWall _wall;
sing() {
_wall = new BeerWall.withBeers(99);
try {
while (true) {
print('${_singAmount(true)} of beer on the wall, ${_singAmount()} of beer.');
_wall.takeBeer();
print('Take one down and pass it around, ${_singAmount()} of beer on the wall.\n');
}
} catch ( var beerException ) {
_wall.beers = 99;
print('$beerException, ${_singAmount()} of beer on the wall.');
}
}
String _singAmount([bool startWithUppercase = false]) {
int amount = _wall.beers;
if (amount > 1) return "$amount ${_wall.container}s";
else if (amount == 1) return "$amount ${_wall.container}";
else if (startWithUppercase) return "No more ${_wall.container}s";
else return "no more ${_wall.container}s";
}
}
main() {
var singer = new Singer();
singer.sing();
}
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Alternative Versions
| Version | Author | Date | Comments | Rate |
|---|---|---|---|---|
| 1 | houmei | 10/13/11 | 0 | |
| Class used version | Jimin Park | 10/12/11 | 0 | |
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