Question

31

JavaScript - Shuffling Objects inside an object (randomize)

rated 0 times [ 36] [ 5] / answers: 1 / hits: 36178 / 14 Years ago, wed, september 15, 2010, 12:00:00

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.

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zariahdiamondz

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answered 14 Years ago terrances · Accepted Answer

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;

}