题解 | #整数中1出现的次数#
整数中1出现的次数（从1到n整数中1出现的次数）
https://www.nowcoder.com/practice/bd7f978302044eee894445e244c7eee6
function NumberOf1Between1AndN_Solution(n) {
let arr = [];
for (let i = 1; i <= n; i++) {
arr.push(i);
}
const str = arr.join('');
const res = str.match(/1/g);
return res ? res.length : 0;
}
module.exports = {
NumberOf1Between1AndN_Solution: NumberOf1Between1AndN_Solution
};
我们JavaScript真是太好了