sytanx refine

ShadowsocksX-NG/NetWorkMonitor.swift

@@ -117,7 +117,7 @@ open class NetWorkMonitor: NSObject {
         let pattern = "en\\w+\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)"
         do {
             let regex = try NSRegularExpression(pattern: pattern, options: NSRegularExpression.Options.caseInsensitive)
-            let results = regex.matches(in: string, options: NSRegularExpression.MatchingOptions(rawValue: 0), range: NSMakeRange(0, string.characters.count))
+            let results = regex.matches(in: string, options: NSRegularExpression.MatchingOptions(rawValue: 0), range: NSMakeRange(0, string.count))
             var upRate: Float = 0.00
             var downRate: Float = 0.00
             for result in results {

ShadowsocksX-NG/PingClient.swift

@@ -116,7 +116,7 @@ class PingServers:NSObject{
             return nil
         }
         res.removeSubrange(res.range(of: "round-trip min/avg/max/stddev = ")!)
-        res = String(res.characters.dropLast(3))
+        res = String(res.dropLast(3))
         res = res.components(separatedBy: "/")[1]
         let latency = Double(res)
         return latency

ShadowsocksX-NG/ProxyPreferencesController.swift

@@ -32,7 +32,7 @@ class ProxyPreferencesController: NSWindowController, NSTableViewDataSource, NST
             selectedNetworkServices = NSMutableSet()
         }
         
-        networkServices = ProxyConfTool.networkServicesList() as NSArray!
+        networkServices = ProxyConfTool.networkServicesList() as NSArray
         tableView.reloadData()
     }