use string interpolation

bomeng · bomeng · commit 4d82c4372588 · 2015-12-08T14:29:30.000-08:00
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala b/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala
@@ -894,10 +894,10 @@ object StreamingContext extends Logging {
   private[streaming] def rddToFileName[T](prefix: String, suffix: String, time: Time): String = {
     var result = time.milliseconds.toString
     if (prefix != null && prefix.length > 0) {
-      result = prefix + "-" + result
+      result = s"$prefix-$result"
     }
     if (suffix != null && suffix.length > 0) {
-      result = result + "." + suffix
+      result = s"$result.$suffix"
     }
     result
   }

Original file line number	Diff line number	Diff line change
`@@ -894,10 +894,10 @@ object StreamingContext extends Logging {`
`894`	`894`	`private[streaming] def rddToFileName[T](prefix: String, suffix: String, time: Time): String = {`
`895`	`895`	`var result = time.milliseconds.toString`
`896`	`896`	`if (prefix != null && prefix.length > 0) {`
`897`		`- result = prefix + "-" + result`
	`897`	`+ result = s"$prefix-$result"`
`898`	`898`	`}`
`899`	`899`	`if (suffix != null && suffix.length > 0) {`
`900`		`- result = result + "." + suffix`
	`900`	`+ result = s"$result.$suffix"`
`901`	`901`	`}`
`902`	`902`	`result`
`903`	`903`	`}`