Re: [PR] [SPARK-51107][CORE] Minor polish for CommandBuilderUtils class. [spark]

["LuciferYang (via GitHub)" <gi...@apache.org>]

LuciferYang commented on code in PR #49826:
URL: https://github.com/apache/spark/pull/49826#discussion_r1944500609


##########
launcher/src/main/java/org/apache/spark/launcher/CommandBuilderUtils.java:
##########
@@ -46,24 +47,15 @@ static boolean isEmpty(String s) {
 
   /** Joins a list of strings using the given separator. */
   static String join(String sep, String... elements) {
-    StringBuilder sb = new StringBuilder();
-    for (String e : elements) {
-      if (e != null) {
-        if (sb.length() > 0) {
-          sb.append(sep);
-        }
-        sb.append(e);
-      }
-    }
-    return sb.toString();
+    return join(sep, Arrays.stream(elements).toList());

Review Comment:
   fine for me, but, please update the PR title to better reflect what this PR has done.
   
   



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