How to get one random element from an array using mersenne twister in javascript?

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How to get one random element from an array using mersenne twister in javascript?



I inherited a gambling project, where mersenne twister is used as a random nunmber generator.



But I am not sure about the implementation of the same.



The library that is used gives random number [0,1>


[0,1>



Now, for the purpose of the app, it should give back one random number from an array of [0,1,2,...,n>


[0,1,2,...,n>



I was wondering, what is the easiest way to implement this, that is statistically correct. (that it passes bigcrush for example)



I believe that current implementation is very bad



https://gist.github.com/matejthetree/5c510babe767634b6c5189d9e482aca3



It is used to shuffle an array and then take one member from that array, instead of taking random [0,length> and choosing array[random]


[0,length>


array[random]









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