Merge pull request scalastyle#208 from oranda/use-isempty

Use .isEmpty instead of .size == 0

Author: matthewfarwell

src/main/scala/org/scalastyle/Checker.scala

@@ -146,7 +146,7 @@ class CheckerUtils(classLoader: Option[ClassLoader] = None) {
   def readFile(file: String, encoding: Option[String])(implicit codec: Codec): String = {
     @tailrec
     def readFileWithEncoding(file: String, encodings: List[String]): Option[String] = {
-      if (encodings.size == 0) {
+      if (encodings.isEmpty) {
         None
       } else {
         val encoding = encodings(0)

src/main/scala/org/scalastyle/Main.scala

@@ -80,7 +80,7 @@ object Main {
       }
     }
 
-    if (!config.config.isDefined || config.directories.size == 0) {
+    if (!config.config.isDefined || config.directories.isEmpty) {
       config = config.copy(error = true)
     }
 

src/main/scala/org/scalastyle/ScalastyleConfiguration.scala

@@ -96,7 +96,7 @@ object ScalastyleConfiguration {
 
   private def contentsOf(node: Node, n: String) = {
     val ns = (node \\ n)
-    if (ns.size == 0) None else (Some(ns(0).text))
+    if (ns.isEmpty) None else (Some(ns(0).text))
   }
 
   def toCheck(node: Node): ConfigurationChecker = {