// Leetcode #165

// Language: Javascript

// Problem: https://leetcode.com/problems/compare-version-numbers/

// Author: Chihung Yu

/**

* @param {string} version1

* @param {string} version2

* @return {number}

*/

var comparator = function(v1,v2){

}

var compareVersion = function(version1, version2) {

var arr1 = version1.split('.');

var arr2 = version2.split('.');

var index = 0;

var len = Math.max(arr1.length, arr2.length);

while(index < len){

var v1 = parseInt(arr1[index]);

var v2 = parseInt(arr2[index]);

if(isNaN(v1) && v2 !== 0){

return -1;

}

if(isNaN(v2) && v1 !== 0){

return 1;

}

if(v1 > v2){

return 1;

} else if(v1 < v2){

return -1;

}

index++;

}

return 0;

};