function fn(n,min,max){
或者为自定义固定数组// var b = ['0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'];
var b = [];
if(typeof(n)==='number'){
for (var i = n ; i > 0; i--) {
// var nub = Math.floor(Math.random()*b.length-1)
var nub = Math.floor(Math.random()*(max-min))+min;
if(b.indexOf(nub)!==-1){
i++
}else{b.push(nub)}
}
return b
}
}
var number = fn(3,2,32)
console.log(number)
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