How to implement shuffling algorithm in JavaScript

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Shuffle algorithm

Earlier chrome would use insert sorting for arrays with elements less than 10, which would cause the array to be out of order. Even if the latest version of chrome uses an in-place algorithm to make sorting a stable algorithm, the problem of out-of-order has not been solved.

Through the shuffle algorithm, the real disorder can be achieved. The shuffle algorithm is divided into in-situ and non-in-situ. Figure 1 is the in-situ shuffle algorithm, which does not need to declare additional arrays to save memory occupancy. The principle is to traverse the elements of the array in turn, randomly select one of the current elements and all subsequent elements, and swap them.

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