JavaScript - 在对象内部洗牌对象（随机化） [英] JavaScript - Shuffling Objects inside an object (randomize)

问题描述

我需要从JSON结果实现随机化。

JSON的格式是两个对象：

<结果：

问题（对象）

  [Object {id =4c6e9a41470b19_96235904，more ...}，
 Object {id =4c784e6e928868_58699409，more ...}，
 Object {id =4c6ecd074662c5_02703822，更多...}，6更多...] 
  

主题（对象）

  [Object {id =3jhf3533279827_23424234，more ...}，
 Object {id =4634663466cvv5_43235236 ，更多...}，
对象{id =47hf3892735298_08476548，更多...}，2更多...] 
  

我想随机化问题对象和主题对象内对象的顺序。

解决方案

您可以使用 Fisher-Yates-Durstenfeld shuffle ：

  var shuffledQuestionArray = shuffle（yourQuestionArray）; 
 var shuffledTopicArray = shuffle（yourTopicArray）; 
 
 // ... 
 
函数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; 
} 
返回sourceArray; 
} 
  

I need to implement a randomization from JSON result.

The format of the JSON is two objects:

result:

Question(object)

[Object { id="4c6e9a41470b19_96235904",  more...}, 
 Object { id="4c784e6e928868_58699409",  more...}, 
 Object { id="4c6ecd074662c5_02703822",  more...}, 6 more...]

Topic(object)

[Object { id="3jhf3533279827_23424234",  more...}, 
 Object { id="4634663466cvv5_43235236",  more...}, 
 Object { id="47hf3892735298_08476548",  more...}, 2 more...]

I want to randomize the order of the objects inside the question object and the topic objects.

解决方案

You could use a 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;
}

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