JavaScript-在对象中无序移动对象(随机)[重复]

你需要一个 Fisher-Yates-Durstenfeld shuffle :

var shuffledQuestionArray = shuffle(yourQuestionArray);
var shuffledTopicArray = shuffle(yourTopicArray);

// ...

function shuffle(sourceArray) {
    for (var i = 0; i < sourceArray.length - 1; i++) {
        var j = i + Math.floor(Math.random() * (sourceArray.length - i));

        var temp = sourceArray[j];
        sourceArray[j] = sourceArray[i];
        sourceArray[i] = temp;
    }
    return sourceArray;
}

最简单的方法(不是完美的洗牌,但在某些情况下可能更好):

function randomize(a, b) {
    return Math.random() - 0.5;
}

yourQuestionArray.sort(randomize);
yourTopicArray.sort(randomize);

或

yourQuestionArray.sort(function (a, b) {return Math.random() - 0.5;});
yourTopicArray.sort(function (a, b) {return Math.random() - 0.5;});

http://jsfiddle.net/dJVHs/ )

我发现 this post 关于使用 Fisher-Yates algorithm 在JavaScript中洗牌数组。它使用以下功能:

function fisherYates ( myArray ) {
  var i = myArray.length;
  if ( i == 0 ) return false;
  while ( --i ) {
     var j = Math.floor( Math.random() * ( i + 1 ) );
     var tempi = myArray[i];
     var tempj = myArray[j];
     myArray[i] = tempj;
     myArray[j] = tempi;
   }
}