Delete pop-pop-win from the repo

samples/pop_pop_win/lib/src/game/field.dart

-// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-part of pop_pop_win.game;
-
-class Field extends Array2d<bool> {
-  final int bombCount;
-  final Array2d<int> _adjacents;
-
-  factory Field([int bombCount = 40, int cols = 16, int rows = 16,
-      int seed = null]) {
-    var squares = new List<bool>.filled(rows * cols, false);
-    assert(bombCount < squares.length);
-    assert(bombCount > 0);
-
-    var rnd = new Random(seed);
-
-    // This is the most simple code, but it'll get slow as
-    // bombCount approaches the square count.
-    // But more efficient if bombCount << square count
-    // which is expected.
-    for (int i = 0; i < bombCount; i++) {
-      int index;
-      do {
-        index = rnd.nextInt(squares.length);
-      } while (squares[index]);
-      squares[index] = true;
-    }
-
-    return new Field._internal(bombCount, cols,
-        new UnmodifiableListView<bool>(squares));
-  }
-
-  factory Field.fromSquares(int cols, int rows, List<bool> squares) {
-    assert(cols > 0);
-    assert(rows > 0);
-    assert(squares.length == cols * rows);
-
-    int count = 0;
-    for (final m in squares) {
-      if (m) {
-        count++;
-      }
-    }
-    assert(count > 0);
-    assert(count < squares.length);
-
-    return new Field._internal(count, cols,
-        new UnmodifiableListView<bool>(squares));
-  }
-
-  Field._internal(this.bombCount, int cols, UnmodifiableListView<bool> source)
-      : this._adjacents = new Array2d<int>(cols, source.length ~/ cols),
-        super.wrap(cols, source.toList()) {
-    assert(width > 0);
-    assert(height > 0);
-    assert(bombCount > 0);
-    assert(bombCount < length);
-
-    int count = 0;
-    for (var m in this) {
-      if (m) {
-        count++;
-      }
-    }
-    assert(count == bombCount);
-  }
-
-  int getAdjacentCount(int x, int y) {
-    if (get(x, y)) {
-      return null;
-    }
-
-    int val = _adjacents.get(x, y);
-
-    if (val == null) {
-      val = 0;
-      for (var i in getAdjacentIndices(x, y)) {
-        if (this[i]) {
-          val++;
-        }
-      }
-      _adjacents.set(x, y, val);
-    }
-    return val;
-  }
-
-  String toString() => 'w${width}h${height}m${bombCount}';
-}