introduced 'excluded' to ignore keys in hash

Author: vvvrrooomm

lib/json-diff/diff.rb

@@ -5,26 +5,33 @@ def self.diff(before, after, opts = {})
     include_moves = opts[:moves].nil? ? true : opts[:moves]
     include_was = opts[:include_was].nil? ? false : opts[:include_was]
     original_indices = opts[:original_indices].nil? ? false : opts[:original_indices]
+    excluded_keys = opts[:excluded] || []
     changes = []
 
     if before.is_a?(Hash)
       if after.is_a?(Hash)
         lost = before.keys - after.keys
         lost.each do |key|
+          next if excluded_keys.include?(key)
+
           inner_path = extend_json_pointer(path, key)
           changes << remove(inner_path, include_was ? before[key] : nil)
         end
 
         if include_addition
           gained = after.keys - before.keys
           gained.each do |key|
+            next if excluded_keys.include?(key)
+
             inner_path = extend_json_pointer(path, key)
             changes << add(inner_path, after[key])
           end
         end
 
         kept = before.keys & after.keys
         kept.each do |key|
+          next if excluded_keys.include?(key)
+
           inner_path = extend_json_pointer(path, key)
           changes += diff(before[key], after[key], opts.merge(path: inner_path))
         end