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我想创建一个函数来检查我的子集是否包含我在 Javascript 中的一个超集。它应该返回真或假。

有 7 个固定超集，每个超集是一个固定的 3 个整数的数组，见下图：

var supersets = [
[1, 2, 3],
[4, 5, 6],
[7, 8, 9],
[1, 4, 7],
[2, 5, 8],
[3, 6, 9],
[1, 5, 9],
[3, 5, 7]];

该子集也是一个数组，但具有随机长度并且是随机顺序的。例如：

var subset1 = [2, 4, 8, 1, 3];

或者

var subset2 = [3, 7, 5];

对于这两个子集，函数应返回 true（子集 1 包含 1、2 和 3）（子集 2 包含 3、5 和 7）

但这应该返回 false，因为它不包含任何超集：

var subset3 = [2, 1, 7, 6]

该功能应该是这样的：

if (subset contains of of the 7 supersets) {
  return true;
} else {
  return false;
}

对于想了解我使用代码的项目的人，这是荷兰版的井字游戏。

var whosTurnElement = document.getElementById("whosTurnElement"),
  errorOutputElement = document.getElementById("errorOutput"),
  fieldOneElement = document.getElementById("fieldOne"),
  fieldTwoElement = document.getElementById("fieldTwo"),
  fieldTreeElement = document.getElementById("fieldTree"),
  fieldFourElement = document.getElementById("fieldFour"),
  fieldFiveElement = document.getElementById("fieldFive"),
  fieldSixElement = document.getElementById("fieldSix"),
  fieldSevenElement = document.getElementById("fieldSeven"),
  fieldEightElement = document.getElementById("fieldEight"),
  fieldNineElement = document.getElementById("fieldNine");

// Switch die aan de hand van een getal het juste element terug geeft
function getCorrespondingElement(field) {
  console.log(playerTurn + "Start switch" + field);
  switch (field) {
    case 1:
      console.log("returing element");
      return document.getElementById("fieldOne");
    case 2:
      return document.getElementById("fieldTwo");
    case 3:
      return document.getElementById("fieldTree");
    case 4:
      return document.getElementById("fieldFour");
    case 5:
      return document.getElementById("fieldFive");
    case 6:
      return document.getElementById("fieldSix");
    case 7:
      return document.getElementById("fieldSeven");
    case 8:
      return document.getElementById("fieldEight");
    case 9:
      return document.getElementById("fieldNine");
  }
};

// Array met winnende compinaties, elke combinatie is opgeslagen als een Array in een Array
var winningMoves = [
  [1, 2, 3],
  [4, 5, 6],
  [7, 8, 9],
  [1, 4, 7],
  [2, 5, 8],
  [3, 6, 9],
  [1, 5, 9],
  [3, 5, 7]
];

// object met de ingevulde vakken
var moves = {

  // Array met player 1 zijn ingevulde vakken
  player1: [],

  // Array met player 2 zijn ingevulde vakken
  player2: []
};

// Check of de moves Array vande spleer overeen komt met een van de de Winning Array
function winCheck(player) {

  // Zet de playerMoves variable naar de huidige player, en sorteert de vakjes
  var playerMoves;
  if (player == "player1") {
    playerMoves = moves.player1.sort();

  } else if (player == "player2") {
    playerMoves = moves.player2.sort();
  }

  // Loopt door de plaermoves heel en kijkt of een een winnende combinatie in zit
  for (var i = 0, l = winningMoves.length; i < l; i++) {
    var found = winningMoves[i].every(function(el) {
      return playerMoves.indexOf(el) > -1;
    });
    if (found) return true;
  }
  return false;
};

// Functie die kijkt of het vakje al is ingevult, het vakje wordt megegeven als parameter
function fieldCheckedCheck(field) {
  var isChecked = false;

  // Loopt door mijn moves Array
  for (var i = 0; i < moves.player1.length; i++) {
    if (moves.player1[i] == field) {
      ischecked = true;
    }
  };

  // Loopt door de computers moves Array
  for (var i = 0; i < moves.player2.length; i++) {
    if (moves.player2[i] == field) {
      ischecked = true;
    }
  };
  return isChecked;
};

// Functie die het ingevulde vakje toevoegd aan het Object met in gevulde vakken. Deze functie krijgt 2 parameters mee, 'player' de huidige speler en 'field' om welk vakje het gaat.
function setMove(player, field) {
  console.log("setMove");
  if (player == "player1") {

    // Kijkt of het vakje al is ingevult
    if (fieldCheckedCheck(field) == true) {

      // Geeft een error weer als het al is ingevult
      errorOutputElement.innerHTML = "Dat vakje is al ingevult";
      return false;

    } else if (fieldCheckedCheck(field) == false) {

      // Voegt het vakje toe aan mijn Array
      moves.player1.push(field);
      console.log(field);

      // Vult het vakje in met een X
      getCorrespondingElement(field).innerHTML = "&times;";
      return true;
    }
  } else if (player == "player2") {

    // Kijkt of het vakje al is ingevult
    if (fieldCheckedCheck(field) == true) {

      // Geeft een error weer als het al is ingevult
      errorOutputElement.innerHTML = "Dat vakje is al ingevult";
      return false;

    } else if (fieldCheckedCheck(field) == false) {

      // Voegt het vakje toe aan mijn Array
      moves.player2.push(field);

      console.log(field);
      // Vult het vakje in met een X
      getCorrespondingElement(field).innerHTML = "&#3664;";

      return true;
    }
  }
};

// Zet de eerste beurt voor Player1
var playerTurn = "player1";

function player1Click(field) {
  if (setMove("player1", field) == true) {
    if (winCheck("player1") == true) {
      window.location.assign = "./player1wins.html";
    } else {
      playerTurn = "player2";
    }
  }
};

function player2Click(field) {
  if (setMove("player2", field) == true) {
    if (winCheck("player2") == true) {
      window.location.assign = "./player2wins.html";
    } else {
      playerTurn = "player1";
    }
  }
};

// Speler 1 aan de beurt is
while (playerTurn == "player1") {
  whosTurnElement.innerHTML = "speler 1";

  fieldOneElement.onclick = player1Click(1);
  fieldTwoElement.onclick = player1Click(2);
  fieldTreeElement.onclick = player1Click(3);
  fieldFourElement.onclick = player1Click(4);
  fieldFiveElement.onclick = player1Click(5);
  fieldSixElement.onclick = player1Click(6);
  fieldSevenElement.onclick = player1Click(7);
  fieldEightElement.onclick = player1Click(8);
  fieldNineElement.onclick = player1Click(9);
}

// Speler 2 aan de beurt is
while (playerTurn == "player2") {
  whosTurnElement.innerHTML = "speler 2";

  fieldOneElement.onclick = player2Click(1);
  fieldTwoElement.onclick = player2Click(2);
  fieldTreeElement.onclick = player2Click(3);
  fieldFourElement.onclick = player2Click(4);
  fieldFiveElement.onclick = player2Click(5);
  fieldSixElement.onclick = player2Click(6);
  fieldSevenElement.onclick = player2Click(7);
  fieldEightElement.onclick = player2Click(8);
  fieldNineElement.onclick = player2Click(9);
}
@import url(https://fonts.googleapis.com/css?family=Open+Sans:400,300);
 body {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  font-family: 'Open Sans', sans-serif;
  background-color: #f0f3f4;
}
h1 {
  font-size: 1.5em;
}
h2 {
  font-size: 1.2em;
}
h2 strong {
  color: #83a7d9;
}
p {
  font-size: 1em;
  font-weight: 300;
  line-height: 2em;
}
.container {
  margin: 0 5vw;
}
header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 3;
  width: 100vw;
  height: 10vh;
  background-color: white;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.19), 0 6px 6px rgba(0, 0, 0, 0.23);
}
header h1 {
  text-align: center;
  line-height: 10vh;
  color: #83a7d9;
  margin: 0;
}
main {
  position: fixed;
  top: 10vh;
  bottom: 5vh;
  left: 0;
  width: 100vw;
  height: 85vh;
  overflow: hidden;
}
section.card {
  width: 80vw;
  background-color: white;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
  text-align: center;
  border-radius: 2vh;
  padding: 5vh 5vw;
  margin-top: 5vh;
}
table {
  width: 100%;
  height: 100%;
  background-color: black;
  border: none;
}
table td {
  font-size: 4em;
  color: #83a7d9;
  background-color: white;
}
<link href="https://necolas.github.io/normalize.css/4.0.0/normalize.css" rel="stylesheet" />
<header>
  <div class="container">
    <h1>Boter Kaas en Eiren</h1>
  </div>
</header>
<main>
  <div class="container">
    <section class="card">
      <h2>Het is <strong id="whosTurnElement">..</strong> zijn beurt.</h2>
      <p id="errorOutput"></p>
    </section>
    <section class="card">
      <table>
        <tr>
          <td id="fieldOne"></td>
          <td id="fieldTwo"></td>
          <td id="fieldTree"></td>
        </tr>
        <tr>
          <td id="fieldFour"></td>
          <td id="fieldFive"></td>
          <td id="fieldSix"></td>
        </tr>
        <tr>
          <td id="fieldSeven"></td>
          <td id="fieldEight"></td>
          <td id="fieldNine"></td>
        </tr>
      </table>
    </section>
  </div>
</main>

4

3 回答 3

2

使用集合和数组方法很容易：

var subset = new Set([2, 4, 8, 1, 3]);
supersets.some(arr => arr.every(item => subset.has(item))); // true
于 2016-03-27T19:02:32.797 回答
1

更多老派版本：

function find(superset, subset) {
  for (var i = 0, l = superset.length; i < l; i++) {
    var elementExists = function (el) { return subset.indexOf(el) > -1; }
    if (superset[i].every(elementExists)) return true;
  }
  return false;
}

find(superset, subset);

演示

于 2016-03-27T19:11:47.117 回答
0

另一个分步解决方案。

function check(a) {
    return supersets.some(function (b) {
        return b.every(function (c) {
            return a.some(function (d) {
                return c === d;
            });
        });
    });
}

var supersets = [[1, 2, 3], [4, 5, 6], [7, 8, 9], [1, 4, 7], [2, 5, 8], [3, 6, 9], [1, 5, 9], [3, 5, 7]];
document.write(check([2, 4, 8, 1, 3]) + '<br>');
document.write(check([3, 7, 5]) + '<br>');
document.write(check([1, 2, 8]) + '<br>');

于 2016-03-27T19:33:24.353 回答