SOURCE

let arr = [];

function test() {
    if(arr.length!==5) {
        let math = randomNum(2,32);
        if(!arr.includes(math)) {
            arr.push(math);
        }
        console.log(`${arr.length}:`,arr)
        test();
    }
}
test();

//生成从minNum到maxNum的随机数
function randomNum(minNum,maxNum){ 
    switch(arguments.length){ 
        case 1: 
            return parseInt(Math.random()*minNum+1,10); 
        break; 
        case 2: 
            return parseInt(Math.random()*(maxNum-minNum+1)+minNum,10); 
        break; 
            default: 
                return 0; 
            break; 
    } 
} 
// console.log(randomNum(2,32))
console.log('-------')