Use empty and present instead of checking size

lib/hawk/http/instrumentation.rb

@@ -32,7 +32,7 @@ def instrument(type, payload)
             elapsed = (Time.now.to_f - start) * 1000
 
             url = payload[:url].to_s
-            if payload[:params] && payload[:params].size > 0
+            if payload[:params].present?
               url << '?' << payload[:params].inject('') { |s, (k, v)| s << [k, '=', v, '&'].join }.chomp('&')
             end
 

lib/hawk/model/association.rb

@@ -15,7 +15,7 @@ def self.included(base)
       #
       def initialize(attributes = {}, params = {})
         super
-        if attributes.size > 0 && self.class.associations?
+        if attributes.present? && self.class.associations?
           preload_associations(attributes, params, self.class)
         end
       end
@@ -138,7 +138,7 @@ def associations
         # Check whether associations are defined
         #
         def associations?
-          @_associations && @_associations.size > 0
+          @_associations.present?
         end
 
         # Check whether the given attribute is an association

lib/hawk/model/proxy.rb

@@ -98,7 +98,7 @@ def method_missing(meth, *args, &block)
 
           # If the method accepts a variable number of parameters, and
           # the last provided one is an hash, merge the scoped params.
-          elsif method.arity < 0 && (method.arity + args.size == 0) && args.last.is_a?(Hash)
+          elsif method.arity < 0 && (method.arity + args.empty?) && args.last.is_a?(Hash)
             args[-1] = params.deep_merge(args[-1])
 
           end

lib/hawk/model/schema.rb

@@ -53,7 +53,7 @@ def cast!(attributes)
       end
 
       def schema(attributes = nil)
-        if attributes && attributes.size > 0 && self.class.schema.nil?
+        if attributes.present? && self.class.schema.nil?
           self.class.define_schema_from(attributes)
         end
         self.class.schema || {}