165. Compare Version Numbers.swift

class Solution {
    func compareVersion(version1: String, _ version2: String) -> Int {
        var v1 = version1.characters.split(".").map { Int(String($0)) }
        var v2 = version2.characters.split(".").map { Int(String($0)) }
        var result = 0
        for i in 0..<max(v1.count,v2.count) {
            let left = i >= v1.count ? 0 : v1[i]
            let right = i >= v2.count ? 0 : v2[i]
            
            if (left == right) {
                result = 0
            } else if left > right {
                return 1
            } else if right > left {
                return -1
            }
        }
        return result
    }
}

current.compare(appStore, options: .numeric)