himitsu-fukuda
4/29/2019 - 12:49 PM

Dartの特徴を教えるよ

.dart
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class Point {
  num x, y;

  // The main constructor for this class.
  Point(this.x, this.y);

  // Delegates to the main constructor.
  Point.alongXAxis(num x) : this(x, 0);
}