organizing hash decorations into modules that we will include with di…

…scretion

lib/gorillib/hashlike/compact.rb

@@ -1,3 +1,34 @@
+require 'gorillib/object/blank'
+
+class Hash
+  #
+  # remove all key-value pairs where the value is nil
+  #
+  def compact
+    reject{|key,val| val.nil? }
+  end unless method_defined?(:compact)
+
+  #
+  # Replace the hash with its compacted self
+  #
+  def compact!
+    replace(compact)
+  end unless method_defined?(:compact!)
+
+  #
+  # remove all key-value pairs where the value is blank
+  #
+  def compact_blank
+    reject{|key,val| val.blank? }
+  end unless method_defined?(:compact_blank)
+
+  #
+  # Replace the hash with its compact_blank'ed self
+  #
+  def compact_blank!
+    replace(compact_blank)
+  end unless method_defined?(:compact_blank!)
+end
     #
     # # delete all attributes where the value is blank?, and return self. Contrast with compact!
     # def compact_blank!

lib/gorillib/hashlike/keys.rb

@@ -1,3 +1,45 @@
+class Hash
+  # Return a new hash with all keys converted to strings.
+  def stringify_keys
+    dup.stringify_keys!
+  end unless method_defined?(:stringify_keys)
+
+  # Destructively convert all keys to strings.
+  def stringify_keys!
+    keys.each do |key|
+      self[key.to_s] = delete(key)
+    end
+    self
+  end unless method_defined?(:stringify_keys!)
+
+  # Return a new hash with all keys converted to symbols, as long as
+  # they respond to +to_sym+.
+  def symbolize_keys
+    dup.symbolize_keys!
+  end unless method_defined?(:symbolize_keys)
+
+  # Destructively convert all keys to symbols, as long as they respond
+  # to +to_sym+.
+  def symbolize_keys!
+    keys.each do |key|
+      self[(key.to_sym rescue key) || key] = delete(key)
+    end
+    self
+  end unless method_defined?(:symbolize_keys!)
+
+  # Validate all keys in a hash match *valid keys, raising ArgumentError on a mismatch.
+  # Note that keys are NOT treated indifferently, meaning if you use strings for keys but assert symbols
+  # as keys, this will fail.
+  #
+  # ==== Examples
+  #   { :name => "Rob", :years => "28" }.assert_valid_keys(:name, :age) # => raises "ArgumentError: Unknown key(s): years"
+  #   { :name => "Rob", :age => "28" }.assert_valid_keys("name", "age") # => raises "ArgumentError: Unknown key(s): name, age"
+  #   { :name => "Rob", :age => "28" }.assert_valid_keys(:name, :age) # => passes, raises nothing
+  def assert_valid_keys(*valid_keys)
+    unknown_keys = keys - [valid_keys].flatten
+    raise(ArgumentError, "Unknown key(s): #{unknown_keys.join(", ")}") unless unknown_keys.empty?
+  end unless method_defined?(:assert_valid_keys)
+end
     # # @return [Hash] the object as a Hash with symbolized keys.
     # def symbolize_keys() to_hash ; end
     # # @return [Hash] the object as a Hash with string keys.

notes/fancy_hashes_and_receivers.textile

@@ -1,4 +1,13 @@
 
+* gorillib/hashlike
+* gorillib/hashlike/slice
+* gorillib/hashlike/deep_dup
+* gorillib/hashlike/
+* gorillib/hashlike/hashlike_via_accessors
+* gorillib/struct/acts_as_hash
+* gorillib/struct/iterates_as_hash
+
+
 
 h4. acts_as_hash