Created
November 14, 2012 13:11
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Dart: Sequential file write/delete operations
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import 'dart:io'; | |
Future<int> saveDelete(int i) { | |
var completer = new Completer(); | |
var path = new Path.fromNative(r'D:\test.txt'); | |
var file = new File.fromPath(path); | |
var outputStream = file.openOutputStream(); | |
if (outputStream.writeString('Hello World!')) { | |
outputStream.close(); | |
} else { | |
outputStream.onClosed = () { | |
file.delete().then((success) { | |
completer.complete(i); | |
}); | |
}; | |
outputStream.onNoPendingWrites = () { | |
outputStream.close(); | |
}; | |
} | |
return completer.future; | |
} | |
main() { | |
Future<int> future = saveDelete(0); | |
for (int i = 0; i < 1000; i++) { | |
future = future.chain((value) => saveDelete(i)); | |
} | |
future.then((value) => print('$value ready!')); | |
} |
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