//小白的比较版本号     function compare(s1,s2){         let arr1=s1.split('.');         let arr2=s2.split('.');         for(let i=0;i<Math.min(arr1.length,arr2.length);i++){             if (parseInt(arr1[i])>parseInt(arr2[i])){                 return 1;                 break;             }else if(parseInt(arr1[i])<parseInt(arr2[i])){                 return -1;                 break;             }else{                 return 0;             }         }     } let s1="1.1.0"; let s2="1.1"; console.log(compare(s1,s2));