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ShuffleAnArray.js
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ShuffleAnArray.js
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/**
* @param {number[]} nums
*/
var Solution = function (nums) {
this.original = nums;
};
/**
* Resets the array to its original configuration and return it.
* @return {number[]}
*/
Solution.prototype.reset = function () {
return this.original;
};
/**
* Returns a random shuffling of the array.
* @return {number[]}
*/
Solution.prototype.shuffle = function () {
var shuffled = this.original;
for (var i = 0; i < shuffled.length; i++) {
var index = Math.floor(Math.random() * (i + 1));
var item = shuffled[index];
shuffled[index] = shuffled[i];
shuffled[i] = item;
}
return shuffled;
};
/**
* Your Solution object will be instantiated and called as such:
* var obj = Object.create(Solution).createNew(nums)
* var param_1 = obj.reset()
* var param_2 = obj.shuffle()
*/