JavaScript算法题

1.两个数组合并,并且排序

<script>
        let arr1 = ['2','6','12','15','23']
        let arr2 = ['12','8','22','25','13','9','18']

        let arrs = arr1.concat(arr2)
        function b(c,d){
            return c-d
        }
        arrs.sort(b)
        console.log(arrs) //['2', '6', '8', '9', '12', '12', '13', '15', '18', '22', '23', '25']
</script>