SOURCE

function getStringNum() {
    let stringArr = []
    for(let i=0; i< 1000; i++) {
        let list = ''
        for(let j= 0; j< 6; j++) {
            let num = Math.floor(Math.random() * 10) 
            // list[j] = num;
            list = list.concat(num)
// console.log(list)
        }
        // let stringNum = list.join(',')
        stringArr.push(list)
    }
    return stringArr
}

let arr = getStringNum() 
// console.log(arr)
console.log(arr.length)


///  检验是否重复 没写