[GitHub] tajo pull request: TAJO-1973: Replace 'while' loop with 'foreach'

[dkhwangbo <gi...@git.apache.org>]

Github user dkhwangbo commented on a diff in the pull request:

    https://github.com/apache/tajo/pull/858#discussion_r46524585
  
    --- Diff: tajo-catalog/tajo-catalog-server/src/test/java/org/apache/tajo/catalog/TestCatalog.java ---
    @@ -274,10 +274,8 @@ public void testDropDatabaseWithAllTables() throws Exception {
         Map<String, List<String>> createdTablesMap = createBaseDatabaseAndTables();
     
         // Each time we drop one database, check all databases and their tables.
    -    Iterator<String> it = new ArrayList<>(createdTablesMap.keySet()).iterator();
    -    while(it.hasNext()) {
    +    for (String databaseName : new ArrayList<>(createdTablesMap.keySet())) {
    --- End diff --
    
    Thanks for your reply. 
    As my understanding, That line is written to convert Set to List because Set has no ordering. I have no idea with another way to get same result. Can I get some more details about your comment? 


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