Fix Hound errors

app/controllers/canvas_controller.rb

@@ -154,7 +154,7 @@ class CanvasController < ApplicationController
     end
 
     # Make sure move parameter is valid
-    to_move = Hash.new
+    to_move = {}
     if can_move_modules(@experiment) && update_params[:move].present?
       begin
         to_move = JSON.parse(update_params[:move])
@@ -173,17 +173,15 @@ class CanvasController < ApplicationController
     end
 
     # Distinguish between moving modules/module_groups
-    to_move_groups = Hash.new
+    to_move_groups = {}
     to_move.each do |key, value|
-      if key.match(/.*,.*/)
+      if key =~ /.*,.*/
         to_move_groups[key.split(',')] = value
         to_move.delete(key)
       end
     end
 
-    if error then
-      render_403 and return
-    end
+    render_403 and return if error
 
     # Make sure that to_clone is an array of pairs,
     # as well as that all IDs exist

app/models/experiment.rb

@@ -476,7 +476,6 @@ class Experiment < ActiveRecord::Base
     end
   end
 
-
   # Move modules; this method accepts a map where keys
   # represent IDs of modules, and values represent experiment
   # IDs of new names to which the given modules should be moved.
@@ -486,20 +485,20 @@ class Experiment < ActiveRecord::Base
     to_move.each do |id, experiment_id|
       my_module = my_modules.find_by_id(id)
       experiment = project.experiments.find_by_id(experiment_id)
-      if my_module.present? && experiment.present?
-        my_module.experiment = experiment
+      next unless my_module.present? && experiment.present?
 
-        # Calculate new module position
-        new_pos = my_module.get_new_position
-        my_module.x = new_pos[:x]
-        my_module.y = new_pos[:y]
+      my_module.experiment = experiment
 
-        unless my_module.outputs.destroy_all && my_module.inputs.destroy_all
-          raise ActiveRecord::ActiveRecordError
-        end
+      # Calculate new module position
+      new_pos = my_module.get_new_position
+      my_module.x = new_pos[:x]
+      my_module.y = new_pos[:y]
 
-        my_module.save!
+      unless my_module.outputs.destroy_all && my_module.inputs.destroy_all
+        raise ActiveRecord::ActiveRecordError
       end
+
+      my_module.save!
     end
   end
 

app/models/my_module.rb

@@ -324,25 +324,23 @@ class MyModule < ActiveRecord::Base
   # Find an empty position for the restored module. It's
   # basically a first empty row with empty space inside x=[0, 32).
   def get_new_position
-    if experiment.blank?
-      return { x: 0, y: 0 }
-    end
+    return { x: 0, y: 0 } if experiment.blank?
 
     # Get all modules position that overlap with first column, [0, WIDTH) and
     # sort them by y coordinate.
-    positions = experiment.active_modules.collect{ |m| [m.x, m.y] }
-                                         .select{ |x, y| x >= 0 && x < WIDTH }
-                                         .sort_by{ |x, y| y }
+    positions = experiment.active_modules.collect { |m| [m.x, m.y] }
+                          .select { |x, _| x >= 0 && x < WIDTH }
+                          .sort_by { |_, y| y }
     return { x: 0, y: 0 } if positions.empty? || positions.first[1] >= HEIGHT
 
     # It looks we'll have to find a gap between the modules if it exists (at
     # least 2*HEIGHT wide
-    ind = positions.each_cons(2).map{ |f, s| s[1]-f[1] }
-                                .index { |y| y >= 2*HEIGHT }
+    ind = positions.each_cons(2).map { |f, s| s[1] - f[1] }
+                   .index { |y| y >= 2 * HEIGHT }
     return { x: 0, y: positions[ind][1] + HEIGHT } if ind
 
     # We lucked out, no gaps, therefore we need to add it after the last element
-    return { x: 0, y: positions.last[1] + HEIGHT }
+    { x: 0, y: positions.last[1] + HEIGHT }
   end
 
   private
@@ -350,5 +348,4 @@ class MyModule < ActiveRecord::Base
   def create_blank_protocol
     protocols << Protocol.new_blank_for_module(self)
   end
-
 end