重构 Dart 中的地图对象列表？

Question

如何重构这个地图对象列表以便更好地阅读？

目标是拥有一个列表变量，以紧凑的方式存储几个点的 x 和 y 值。不一定是地图对象列表，我只是在写的时候发现它最合适。

final List<Map<String, double>> _positions = [
  {
    'x': _offsetCircle + _circleDistanceHorizontal * 1,
    'y': _height * 0.120
  },
  {
    'x': _offsetCircle + _circleDistanceHorizontal * 2,
    'y': _height * 0.075
  },
  {
    'x': _offsetCircle + _circleDistanceHorizontal * 3,
    'y': _height * 0.095
  },
  {
    'x': _offsetCircle + _circleDistanceHorizontal * 4,
    'y': _height * 0.070
  },
  {
    'x': _offsetCircle + _circleDistanceHorizontal * 5,
    'y': _height * 0.085
  },
  {
    'x': _offsetCircle + _circleDistanceHorizontal * 6,
    'y': _height * 0.055
  },
  {
    'x': _offsetCircle + _circleDistanceHorizontal * 7,
    'y': _height * 0.060
  },
  {
    'x': _offsetCircle + _circleDistanceHorizontal * 8,
    'y': _height * 0.060
  },
  {
    'x': _offsetCircle + _circleDistanceHorizontal * 9,
    'y': _height * 0.045
  },
  {
    'x': _offsetCircle + _circleDistanceHorizontal * 10,
    'y': _height * 0.025
  },
  {
    'x': _offsetCircle + _circleDistanceHorizontal * 11,
    'y': _height * 0.04
  },
  {
    'x': _offsetCircle + _circleDistanceHorizontal * 12,
    'y': _height * 0.005
  }
];

Answer 1

    final items = [0.12, 0.075, 0.095];
  List<Map<String, double>> result = List<Map<String, double>>.generate(items.length ,(index) {
    return {
      'x': _offsetCircle + _circleDistanceHorizontal * (index + 1), 
      'y':_height * items[index]
     };
  });

Answer 2

@Axot 的回答很好。我认为您可能还想改进存储的数据结构。如果您要存储坐标，也许只需创建一个点 class.

class Point {
  final double x;
  final double y;

  Point(this.x, this.y);
}

double _offsetCircle = 1.0, _circleDistanceHorizontal = 1.0;
double _height = 1.0;
final factors = [0.120, 0.075, 0.095];

final list = Iterable<int>.generate(factors.length)
    .map((i) => Point(_offsetCircle + _circleDistanceHorizontal * (i + 1),
        _height * factors[i]))
    .toList();

重构 Dart 中的地图对象列表？

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