Add non-throwing chunked array accessor to ArrowColumn.

Sources/Arrow/Array/ArrowColumn.swift

@@ -34,4 +34,10 @@ public class ArrowColumn {
         .runtimeError("Could not cast array holder to chunked array."))
     }
   }
+
+  /// Return the data as a chunked array, cast to the type.
+  /// - Returns: The chunked array or nil if the array cannot be cast to the inferred type.
+  public func array<T>() -> ChunkedArray<T>? {
+    self.dataHolder as? ChunkedArray<T>
+  }
 }

Sources/Arrow/ArrowField.swift

@@ -74,20 +74,20 @@ extension ArrowField {
     )
   }
 
-//  /// Create a new `ArrowField` suitable for `ArrowType::Dictionary`.
-//  public init(
-//    dictWithName: String,
-//    key: ArrowType,
-//    value: ArrowType,
-//    isNullable: Bool
-//  ) {
-//    precondition(
-//      key.isDictionaryKeyType,
-//      "\(key) is not a valid dictionary key"
-//    )
-//    let dataType: ArrowType = .dictionary(key, value)
-//    self = Self(name: dictWithName, dataType: dataType, isNullable: isNullable)
-//  }
+  //  /// Create a new `ArrowField` suitable for `ArrowType::Dictionary`.
+  //  public init(
+  //    dictWithName: String,
+  //    key: ArrowType,
+  //    value: ArrowType,
+  //    isNullable: Bool
+  //  ) {
+  //    precondition(
+  //      key.isDictionaryKeyType,
+  //      "\(key) is not a valid dictionary key"
+  //    )
+  //    let dataType: ArrowType = .dictionary(key, value)
+  //    self = Self(name: dictWithName, dataType: dataType, isNullable: isNullable)
+  //  }
 
   /// Create a new struct `ArrowField`.
   ///

Sources/Arrow/ArrowType.swift

@@ -699,7 +699,10 @@ extension ArrowType {
         && aField.type.equalsDataType(bField.type) && aSorted == bSorted
 
     // Dictionary
-    case (.dictionary(_, _, let aKey, let aValue), .dictionary(_, _, let bKey, let bValue)):
+    case (
+      .dictionary(_, _, let aKey, let aValue),
+      .dictionary(_, _, let bKey, let bValue)
+    ):
       // Ignoring dictionary id here.
       return aKey.equalsDataType(bKey) && aValue.equalsDataType(bValue)
 

Tests/ArrowIPCTests/ArrowTestingGold.swift

@@ -82,7 +82,7 @@ struct ArrowTestingGold {
     "generated_union",
   ]
 
-//  @Test
+  //  @Test
   func readFile() throws {
 
     let name = "generated_dictionary"