fix rubocop warnings

Author: suketa

sample/issue922.rb

@@ -38,7 +38,7 @@ module Polars
     module DataFrame
       class TableAdapter
         def call(df, name) # rubocop:disable Metrics/MethodLength, Naming/MethodParameterName
-          columns = df.columns.each_with_object({}) { |header, hash| hash[header] = LogicalType::VARCHAR }
+          columns = df.columns.to_h { |header| [header, LogicalType::VARCHAR] }
           counter = 0
           height = df.height
           width = df.columns.length

sample/issue930.rb

@@ -7,11 +7,11 @@
 
 module DuckDB
   class Connection
-    def register_as_table(name, io, csv_options: {}) # rubocop:disable Metrics/MethodLength, Metrics/AbcSize
+    def register_as_table(name, io, csv_options: {}) # rubocop:disable Metrics/MethodLength
       csv = CSV.new(io, **csv_options)
       headers = csv.first.headers
       csv.rewind
-      columns = headers.each_with_object({}) { |header, hash| hash[header] = LogicalType::VARCHAR }
+      columns = headers.to_h { |header| [header, LogicalType::VARCHAR] }
       tf = DuckDB::TableFunction.create(
         name:,
         columns:

sample/issue930_benchmark.rb

@@ -7,11 +7,11 @@
 
 module DuckDB
   class Connection
-    def register_as_table_with_table_function(name, io, csv_options: {}) # rubocop:disable Metrics/AbcSize, Metrics/MethodLength
+    def register_as_table_with_table_function(name, io, csv_options: {}) # rubocop:disable Metrics/MethodLength
       csv = CSV.new(io, **csv_options)
       headers = csv.first.headers
       csv.rewind
-      columns = headers.each_with_object({}) { |header, hash| hash[header] = LogicalType::VARCHAR }
+      columns = headers.to_h { |header| [header, LogicalType::VARCHAR] }
       tf = DuckDB::TableFunction.create(
         name:,
         columns:

test/duckdb_test/column_test.rb

@@ -143,7 +143,7 @@ def test_type
     def test_logical_type
       logical_types = @columns.map(&:logical_type)
 
-      assert(logical_types.all? { |logical_type| logical_type.is_a?(DuckDB::LogicalType) })
+      assert(logical_types.all?(DuckDB::LogicalType))
     end
 
     def test_name

test/duckdb_test/logical_type_test.rb

@@ -192,7 +192,7 @@ def test_list_child_type
         list_column.logical_type.child_type
       end
 
-      assert(child_types.all? { |child_type| child_type.is_a?(DuckDB::LogicalType) })
+      assert(child_types.all?(DuckDB::LogicalType))
       assert_equal(%i[integer varchar], child_types.map(&:type))
     end
 
@@ -210,7 +210,7 @@ def test_array_child_type
         array_column.logical_type.child_type
       end
 
-      assert(child_types.all? { |child_type| child_type.is_a?(DuckDB::LogicalType) })
+      assert(child_types.all?(DuckDB::LogicalType))
       assert_equal(%i[integer varchar], child_types.map(&:type))
     end
 
@@ -258,7 +258,7 @@ def test_union_each_member_type
       union_logical_type = union_column.logical_type
       member_types = union_logical_type.each_member_type.to_a
 
-      assert(member_types.all? { |member_type| member_type.is_a?(DuckDB::LogicalType) })
+      assert(member_types.all?(DuckDB::LogicalType))
       assert_equal(%i[integer varchar], member_types.map(&:type))
     end
 
@@ -281,7 +281,7 @@ def test_struct_each_child_type
       struct_logical_type = struct_column.logical_type
       child_types = struct_logical_type.each_child_type.to_a
 
-      assert(child_types.all? { |child_type| child_type.is_a?(DuckDB::LogicalType) })
+      assert(child_types.all?(DuckDB::LogicalType))
       assert_equal(%i[varchar integer], child_types.map(&:type))
     end
 

test/duckdb_test/table_function_csv_test.rb

@@ -29,7 +29,7 @@ def call(csv, name, columns: nil)
       def columns(csv)
         headers = csv.first.headers
         csv.rewind
-        headers.each_with_object({}) { |header, hash| hash[header] = DuckDB::LogicalType::VARCHAR }
+        headers.to_h { |header| [header, DuckDB::LogicalType::VARCHAR] }
       end
 
       # read a line from the csv and write to output, return number of rows written