add serialization

.gitignore

@@ -1,6 +1,5 @@
 # compiled output
 /tmp
-Gemfile.lock
 /.yardoc
 .rake_tasks~
 *.so

Gemfile.lock

@@ -0,0 +1,56 @@
+PATH
+  remote: .
+  specs:
+    numruby (0.0.1)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    ast (2.4.1)
+    coderay (1.1.3)
+    json (2.5.1)
+    method_source (1.0.0)
+    minitest (5.14.3)
+    parallel (1.20.1)
+    parser (3.0.0.0)
+      ast (~> 2.4.1)
+    pry (0.13.1)
+      coderay (~> 1.1)
+      method_source (~> 1.0)
+    rainbow (3.0.0)
+    rake (13.0.3)
+    rake-compiler (0.9.9)
+      rake
+    rdoc (4.3.0)
+    regexp_parser (2.0.3)
+    rexml (3.2.4)
+    rubocop (1.8.1)
+      parallel (~> 1.10)
+      parser (>= 3.0.0.0)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml
+      rubocop-ast (>= 1.2.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 3.0)
+    rubocop-ast (1.4.0)
+      parser (>= 2.7.1.5)
+    ruby-progressbar (1.11.0)
+    unicode-display_width (2.0.0)
+
+PLATFORMS
+  x86_64-linux
+
+DEPENDENCIES
+  bundler (>= 1.6)
+  json (>= 1.5.5)
+  minitest (~> 5.0)
+  numruby!
+  pry (~> 0.10)
+  rake (>= 10.3)
+  rake-compiler (~> 0.8)
+  rdoc (~> 4.0, >= 4.0.1)
+  rubocop (>= 0.49.0)
+
+BUNDLED WITH
+   2.2.6

lib/numruby/nmatrix.rb

@@ -89,6 +89,46 @@ def to_a
     return self.elements
   end
 
+  def _dump data
+    [
+      self.dim,
+      self.dtype,
+      self.stype,
+      self.shape,
+      self.elements,
+    ].join(":")
+  end
+
+  def self._load serial
+    data = serial.split(":")
+    dim = data[0].to_i
+    dtype = data[1].to_sym
+    stype = data[2].to_sym
+    shape = data[3..(3+dim-1)]
+    elements = data[(3+dim)..data.length-1]
+    parsed_elements = []
+
+    if dtype == :nm_bool 
+      elements.each do |e|
+        parsed_elements.push(e == "true" ? true : false)
+      end
+    elsif dtype == :nm_float64
+      elements.each do |e|
+        parsed_elements.push(e.to_f)
+      end
+    else 
+      # Convert to Integer
+      elements.each do |e|
+        parsed_elements.push(e.to_i)
+      end
+    end
+    parsed_shape = []
+    shape.each do |e| 
+      parsed_shape.push(e.to_i)
+    end
+    self.new(parsed_shape, parsed_elements, dtype)
+  end
+
   def inspect #:nodoc:
     original_inspect = super()
     original_inspect = original_inspect[0...original_inspect.size-1]

test/nmatrix_test.rb

@@ -60,4 +60,16 @@ def test_slicing
     assert_equal @m_int[0, 0..1, 0..1], @s_int
   end
 
+  def test_serializing
+    serialized_data_float = Marshal.dump(@m)
+    deserialized_data_float = Marshal.load(serialized_data_float)
+    serialized_data_int = Marshal.dump(@m_int)
+    deserialized_data_int = Marshal.load(serialized_data_int)
+    serialized_data_bool = Marshal.dump(@b)
+    deserialized_data_bool = Marshal.load(serialized_data_bool)
+    assert_equal @m, deserialized_data_float
+    assert_equal @m_int, deserialized_data_int
+    assert_equal @b, deserialized_data_bool
+  end
+
 end