mapleFU commented on code in PR #38959:
URL: https://github.com/apache/arrow/pull/38959#discussion_r1413140185


##########
cpp/src/parquet/encoding.h:
##########
@@ -233,7 +233,7 @@ class DictEncoder : virtual public TypedEncoder<DType> {
 
   /// \brief EXPERIMENTAL: Append dictionary indices into the encoder. It is
   /// assumed (without any boundschecking) that the indices reference
-  /// pre-existing dictionary values
+  /// preexisting dictionary values

Review Comment:
   Actually I'm not a native english speaker, so I wonder what's the 
differences between `pre-existing`  and `preexisting`?



##########
cpp/src/parquet/statistics.h:
##########
@@ -205,7 +205,7 @@ class PARQUET_EXPORT Statistics {
       ::arrow::MemoryPool* pool = ::arrow::default_memory_pool());
 
   /// \brief Create a new statistics instance given a column schema
-  /// definition and pre-existing state
+  /// definition and preexisting state

Review Comment:
   ditto



##########
cpp/src/parquet/reader_test.cc:
##########
@@ -425,7 +425,7 @@ TEST_F(TestAllTypesPlain, TestBatchRead) {
   ASSERT_FALSE(col->HasNext());
 }
 
-TEST_F(TestAllTypesPlain, RowGroupColumnBoundchecking) {
+TEST_F(TestAllTypesPlain, RowGroupColumnBoundschecking) {

Review Comment:
   ```suggestion
   TEST_F(TestAllTypesPlain, RowGroupColumnBoundsChecking) {
   ```



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