7 files changed, 9 insertions, 21 deletions
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index f3a8e5ae..a855f812 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -208,18 +208,6 @@ Style/IfUnlessModifier:
   Enabled: false
 
 # This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyle.
-# SupportedStyles: line_count_dependent, lambda, literal
-Style/Lambda:
-  Exclude:
-    - 'lib/axlsx/drawing/chart.rb'
-    - 'lib/axlsx/drawing/scaling.rb'
-    - 'lib/axlsx/stylesheet/gradient_fill.rb'
-    - 'lib/axlsx/stylesheet/gradient_stop.rb'
-    - 'lib/axlsx/stylesheet/styles.rb'
-    - 'lib/axlsx/util/validators.rb'
-
-# This cop supports safe autocorrection (--autocorrect).
 # Configuration parameters: AllowMethodComparison.
 Style/MultipleComparison:
   Exclude:
diff --git a/lib/axlsx/drawing/chart.rb b/lib/axlsx/drawing/chart.rb
index 1e0b3fb6..c84e5cba 100644
--- a/lib/axlsx/drawing/chart.rb
+++ b/lib/axlsx/drawing/chart.rb
@@ -160,7 +160,7 @@ module Axlsx
     # The style for the chart.
     # see ECMA Part 1 §21.2.2.196
     # @param [Integer] v must be between 1 and 48
-    def style=(v) DataTypeValidator.validate "Chart.style", Integer, v, lambda { |arg| arg >= 1 && arg <= 48 }; @style = v; end
+    def style=(v) DataTypeValidator.validate "Chart.style", Integer, v, ->(arg) { arg >= 1 && arg <= 48 }; @style = v; end
 
     # @see legend_position
     def legend_position=(v) RestrictionValidator.validate "Chart.legend_position", [:b, :l, :r, :t, :tr], v; @legend_position = v; end
diff --git a/lib/axlsx/drawing/scaling.rb b/lib/axlsx/drawing/scaling.rb
index 4d5a9d2a..c9101ead 100644
--- a/lib/axlsx/drawing/scaling.rb
+++ b/lib/axlsx/drawing/scaling.rb
@@ -35,7 +35,7 @@ module Axlsx
     attr_reader :min
 
     # @see logBase
-    def logBase=(v) DataTypeValidator.validate "Scaling.logBase", [Integer], v, lambda { |arg| arg >= 2 && arg <= 1000 }; @logBase = v; end
+    def logBase=(v) DataTypeValidator.validate "Scaling.logBase", [Integer], v, ->(arg) { arg >= 2 && arg <= 1000 }; @logBase = v; end
     # @see orientation
     def orientation=(v) RestrictionValidator.validate "Scaling.orientation", [:minMax, :maxMin], v; @orientation = v; end
     # @see max
diff --git a/lib/axlsx/stylesheet/gradient_fill.rb b/lib/axlsx/stylesheet/gradient_fill.rb
index ff6903a5..508c91a2 100644
--- a/lib/axlsx/stylesheet/gradient_fill.rb
+++ b/lib/axlsx/stylesheet/gradient_fill.rb
@@ -86,7 +86,7 @@ module Axlsx
 
     # validates that the value provided is between 0.0 and 1.0
     def validate_format_percentage(name, value)
-      DataTypeValidator.validate name, Float, value, lambda { |arg| arg >= 0.0 && arg <= 1.0 }
+      DataTypeValidator.validate name, Float, value, ->(arg) { arg >= 0.0 && arg <= 1.0 }
     end
 
     # Serializes the object
diff --git a/lib/axlsx/stylesheet/gradient_stop.rb b/lib/axlsx/stylesheet/gradient_stop.rb
index dd0ea00f..b0d66683 100644
--- a/lib/axlsx/stylesheet/gradient_stop.rb
+++ b/lib/axlsx/stylesheet/gradient_stop.rb
@@ -24,7 +24,7 @@ module Axlsx
     # @see color
     def color=(v) DataTypeValidator.validate "GradientStop.color", Color, v; @color = v end
     # @see position
-    def position=(v) DataTypeValidator.validate "GradientStop.position", Float, v, lambda { |arg| arg >= 0 && arg <= 1 }; @position = v end
+    def position=(v) DataTypeValidator.validate "GradientStop.position", Float, v, ->(arg) { arg >= 0 && arg <= 1 }; @position = v end
 
     # Serializes the object
     # @param [String] str
diff --git a/lib/axlsx/stylesheet/styles.rb b/lib/axlsx/stylesheet/styles.rb
index bdda36c7..d9c5683a 100644
--- a/lib/axlsx/stylesheet/styles.rb
+++ b/lib/axlsx/stylesheet/styles.rb
@@ -380,7 +380,7 @@ module Axlsx
         end
       end
 
-      validate_border_hash = ->(val) {
+      validate_border_hash = lambda { |val|
         unless val.key?(:style) && val.key?(:color)
           raise ArgumentError, format(ERR_INVALID_BORDER_OPTIONS, options[:border])
         end
diff --git a/lib/axlsx/util/validators.rb b/lib/axlsx/util/validators.rb
index 8533145d..fd17360e 100644
--- a/lib/axlsx/util/validators.rb
+++ b/lib/axlsx/util/validators.rb
@@ -83,7 +83,7 @@ module Axlsx
   end
 
   # Validates an unsigned intger
-  UINT_VALIDATOR = lambda { |arg| arg.respond_to?(:>=) && arg >= 0 }
+  UINT_VALIDATOR = ->(arg) { arg.respond_to?(:>=) && arg >= 0 }
 
   # Requires that the value is a Integer and is greater or equal to 0
   # @param [Any] v The value validated
@@ -109,7 +109,7 @@ module Axlsx
 
   VALID_BOOLEAN_CLASSES = [TrueClass, FalseClass, Integer, String, Symbol].freeze
   VALID_BOOLEAN_VALUES = [true, false, 1, 0, '1', '0', 'true', 'false', :true, :false].freeze
-  BOOLEAN_VALIDATOR = lambda { |arg| VALID_BOOLEAN_VALUES.include?(arg) }
+  BOOLEAN_VALIDATOR = ->(arg) { VALID_BOOLEAN_VALUES.include?(arg) }
 
   # Requires that the value is a form that can be evaluated as a boolean in an xml document.
   # The value must be an instance of String, Integer, Symbol, TrueClass or FalseClass and
@@ -137,14 +137,14 @@ module Axlsx
     RegexValidator.validate "number_with_unit", /\A[0-9]+(\.[0-9]+)?(mm|cm|in|pt|pc|pi)\Z/, v
   end
 
-  SCALE_10_400_VALIDATOR = lambda { |arg| arg >= 10 && arg <= 400 }
+  SCALE_10_400_VALIDATOR = ->(arg) { arg >= 10 && arg <= 400 }
 
   # Requires that the value is an integer ranging from 10 to 400.
   def self.validate_scale_10_400(v)
     DataTypeValidator.validate "page_scale", Integer, v, SCALE_10_400_VALIDATOR
   end
 
-  SCALE_0_10_400_VALIDATOR = lambda { |arg| arg == 0 || (arg >= 10 && arg <= 400) }
+  SCALE_0_10_400_VALIDATOR = ->(arg) { arg == 0 || (arg >= 10 && arg <= 400) }
 
   # Requires that the value is an integer ranging from 10 to 400 or 0.
   def self.validate_scale_0_10_400(v)