Merge branch 'master' into recursive-parsing

lib/liquid/drop.rb

@@ -44,6 +44,10 @@ module Liquid
       true
     end
 
+    def inspect
+      self.class.to_s
+    end
+
     def to_liquid
       self
     end
@@ -54,7 +58,16 @@ module Liquid
 
     # Check for method existence without invoking respond_to?, which creates symbols
     def self.invokable?(method_name)
-      @invokable_methods ||= Set.new((public_instance_methods - Liquid::Drop.public_instance_methods).map(&:to_s))
+      unless @invokable_methods
+        # Ruby 1.8 compatibility: call to_s on method names (which are strings in 1.8, but already symbols in 1.9)
+        blacklist = (Liquid::Drop.public_instance_methods + [:each]).map(&:to_s)
+        if include?(Enumerable)
+          blacklist += Enumerable.public_instance_methods.map(&:to_s)
+          blacklist -= [:sort, :count, :first, :min, :max, :include?].map(&:to_s)
+        end
+        whitelist = [:to_liquid] + (public_instance_methods.map(&:to_s) - blacklist.map(&:to_s))
+        @invokable_methods = Set.new(whitelist.map(&:to_s))
+      end
       @invokable_methods.include?(method_name.to_s)
     end
   end

lib/liquid/standardfilters.rb

@@ -81,7 +81,7 @@ module Liquid
     # Sort elements of the array
     # provide optional property with which to sort an array of hashes or drops
     def sort(input, property = nil)
-      ary = [input].flatten
+      ary = flatten_if_necessary(input)
       if property.nil?
         ary.sort
       elsif ary.first.respond_to?('[]') and !ary.first[property].nil?
@@ -99,11 +99,14 @@ module Liquid
 
     # map/collect on a given property
     def map(input, property)
-      ary = [input].flatten
-      if ary.first.respond_to?('[]') and !ary.first[property].nil?
-        ary.map {|e| e[property] }
-      elsif ary.first.respond_to?(property)
-        ary.map {|e| e.send(property) }
+      flatten_if_necessary(input).map do |e|
+        e = e.call if e.is_a?(Proc)
+
+        if property == "to_liquid"
+          e
+        elsif e.respond_to?(:[])
+          e[property]
+        end
       end
     end
 
@@ -244,6 +247,17 @@ module Liquid
 
     private
 
+    def flatten_if_necessary(input)
+      ary = if input.is_a?(Array)
+        input.flatten
+      elsif input.kind_of?(Enumerable)
+        input
+      else
+        [input].flatten
+      end
+      ary.map{ |e| e.respond_to?(:to_liquid) ? e.to_liquid : e }
+    end
+
     def to_number(obj)
       case obj
       when Float