Issue with v2v bin operation and indexes (SciRuby#501)

lib/daru/helpers/array.rb

@@ -36,5 +36,18 @@ def array_of?(array, match)
         !array.empty? &&
         array.all? { |el| match === el } # rubocop:disable Style/CaseEquality,Performance/RedundantEqualityComparisonBlock
     end
+
+    def sort_composite_data(array)
+      array.sort
+    rescue ArgumentError, TypeError => e
+      case e.to_s
+      when /comparison of Symbol with String failed/,
+        /comparison of Symbol with \d+ failed/,
+        /comparison of String with :.* failed/,
+        /comparison of Integer with :.* failed/,
+        /no implicit conversion from nil to integer/
+        array.sort_by(&:to_s)
+      end
+    end
   end
 end

lib/daru/maths/arithmetic/vector.rb

@@ -92,7 +92,7 @@ def v2o_binary(operation, other)
 
         def v2v_binary(operation, other, opts = {})
           # FIXME: why the sorting?.. - zverok, 2016-05-18
-          index = (@index.to_a | other.index.to_a).sort
+          index = ArrayHelper.sort_composite_data(@index.to_a | other.index.to_a)
 
           elements = index.map do |idx|
             this = self.index.include?(idx) ? self[idx] : nil

spec/maths/arithmetic/vector_spec.rb

@@ -1,48 +1,68 @@
 describe Daru::Vector do
-  before :each do
-    @dv1 = Daru::Vector.new [1,2,3,4], name: :boozy, index: [:bud, :kf, :henie, :corona]
-    @dv2 = Daru::Vector.new [1,2,3,4], name: :mayer, index: [:obi, :wan, :kf, :corona]
-    @with_md1 = Daru::Vector.new [1,2,3,nil,5,nil], name: :missing, index: [:a, :b, :c, :obi, :wan, :corona]
-    @with_md2 = Daru::Vector.new [1,2,3,nil,5,nil], name: :missing, index: [:obi, :wan, :corona, :a, :b, :c]
+  let(:dv1) { described_class.new([1, 2, 3, 4], name: :boozy, index: [:bud, :kf, :henie, :corona]) }
+  let(:dv2) { described_class.new([1, 2, 3, 4], name: :mayer, index: [:obi, :wan, :kf, :corona]) }
+  let(:with_md1) do
+    described_class.new([1, 2, 3, nil, 5, nil], name: :missing, index: [:a, :b, :c, :obi, :wan, :corona])
+  end
+  let(:with_md2) do
+    described_class.new([1, 2, 3, nil, 5, nil], name: :missing, index: [:obi, :wan, :corona, :a, :b, :c])
   end
 
-  context "#+" do
+  describe "#+" do
     it "adds matching indexes of the other vector" do
-      expect(@dv1 + @dv2).to eq(Daru::Vector.new([nil,8,nil,5,nil,nil], name: :boozy, index: [:bud,:corona,:henie,:kf,:obi,:wan]))
+      expect(dv1 + dv2).to eq(
+        Daru::Vector.new([nil, 8, nil, 5, nil, nil], name: :boozy, index: [:bud, :corona, :henie, :kf, :obi, :wan])
+      )
     end
 
     it "adds number to each element of the entire vector" do
-      expect(@dv1 + 5).to eq(Daru::Vector.new [6,7,8,9], name: :boozy, index: [:bud, :kf, :henie, :corona])
+      expect(dv1 + 5).to eq(Daru::Vector.new([6, 7, 8, 9], name: :boozy, index: [:bud, :kf, :henie, :corona]))
     end
 
     it "does not add when a number is being added" do
-      expect(@with_md1 + 1).to eq(Daru::Vector.new([2,3,4,nil,6,nil], name: :missing, index: [:a, :b, :c, :obi, :wan, :corona]))
+      expect(with_md1 + 1).to eq(
+        Daru::Vector.new([2, 3, 4, nil, 6, nil], name: :missing, index: [:a, :b, :c, :obi, :wan, :corona])
+      )
     end
 
     it "puts a nil when one of the operands is nil" do
-      expect(@with_md1 + @with_md2).to eq(Daru::Vector.new([nil,7,nil,nil,nil,7], name: :missing, index: [:a, :b, :c, :corona, :obi, :wan]))
+      expect(with_md1 + with_md2).to eq(
+        Daru::Vector.new([nil, 7, nil, nil, nil, 7], name: :missing, index: [:a, :b, :c, :corona, :obi, :wan])
+      )
+    end
+
+    context 'when vectors have numeric and non-numeric indexes' do
+      let(:dv1) { described_class.new([1, 2, 3]) }
+      let(:dv2) { described_class.new([1, 2, 3], index: [:a, :b, :c]) }
+
+      it "appropriately adds vectors with numeric and non-numeric indexes" do
+        expect(dv1 + dv2).to eq(Daru::Vector.new(Array.new(6), index: [0, 1, 2, :a, :b, :c]))
+      end
     end
 
-    it "appropriately adds vectors with numeric and non-numeric indexes" do
-      pending "Need an alternate index implementation?"
-      v1 = Daru::Vector.new([1,2,3])
-      v2 = Daru::Vector.new([1,2,3], index: [:a,:b,:c])
+    context 'when index contains symbols and strings' do
+      let(:dv1) { described_class.new([1, 2, 3, 4], name: :boozy, index: [:bud, 'kf', :henie, :corona]) }
+      let(:dv2) { described_class.new([1, 2, 3, 4], name: :mayer, index: [:obi, :wan, 'kf', :corona]) }
 
-      expect(v1 + v2).to eq(Daru::Vector.new([nil]*6, index: [0,1,2,:a,:b,:c]))
+      it "adds matching indexes of the other vector" do
+        expect(dv1 + dv2).to eq(
+          Daru::Vector.new([nil,8,nil,5,nil,nil], name: :boozy, index: [:bud, :corona, :henie, 'kf', :obi, :wan])
+        )
+      end
     end
   end
 
-  context "#-" do
+  describe "#-" do
     it "subtracts matching indexes of the other vector" do
-      expect(@dv1 - @dv2).to eq(Daru::Vector.new([nil,0,nil,-1,nil,nil], name: :boozy, index: [:bud,:corona,:henie,:kf,:obi,:wan]))
+      expect(dv1 - dv2).to eq(Daru::Vector.new([nil,0,nil,-1,nil,nil], name: :boozy, index: [:bud,:corona,:henie,:kf,:obi,:wan]))
     end
 
     it "subtracts number from each element of the entire vector" do
-      expect(@dv1 - 5).to eq(Daru::Vector.new [-4,-3,-2,-1], name: :boozy, index: [:bud, :kf, :henie, :corona])
+      expect(dv1 - 5).to eq(Daru::Vector.new [-4,-3,-2,-1], name: :boozy, index: [:bud, :kf, :henie, :corona])
     end
   end
 
-  context "#*" do
+  describe "#*" do
     it "multiplies matching indexes of the other vector" do
 
     end
@@ -52,7 +72,7 @@
     end
   end
 
-  context "#\/" do
+  describe "#\/" do
     it "divides matching indexes of the other vector" do
 
     end
@@ -62,55 +82,53 @@
     end
   end
 
-  context "#%" do
+  describe "#%" do
 
   end
 
-  context "#**" do
+  describe "#**" do
 
   end
 
-  context "#exp" do
+  describe "#exp" do
     it "calculates exp of all numbers" do
-      expect(@with_md1.exp.round(3)).to eq(Daru::Vector.new([2.718281828459045,
+      expect(with_md1.exp.round(3)).to eq(Daru::Vector.new([2.718281828459045,
         7.38905609893065, 20.085536923187668, nil, 148.4131591025766, nil], index:
         [:a, :b, :c, :obi, :wan, :corona], name: :missing).round(3))
     end
   end
 
-  context "#add" do
-
+  describe "#add" do
     it "adds two vectors with nils as 0 if skipnil is true" do
-      expect(@with_md1.add(@with_md2, skipnil: true)).to eq(Daru::Vector.new(
+      expect(with_md1.add(with_md2, skipnil: true)).to eq(Daru::Vector.new(
         [1, 7, 3, 3, 1, 7],
         name: :missing,
         index: [:a, :b, :c, :corona, :obi, :wan]))
     end
 
     it "adds two vectors same as :+ if skipnil is false" do
-      expect(@with_md1.add(@with_md2, skipnil: false)).to eq(Daru::Vector.new(
+      expect(with_md1.add(with_md2, skipnil: false)).to eq(Daru::Vector.new(
         [nil, 7, nil, nil, nil, 7],
         name: :missing,
         index: [:a, :b, :c, :corona, :obi, :wan]))
     end
-
   end
 
-  context "#abs" do
+  describe "#abs" do
     it "calculates abs value" do
-      @with_md1.abs
+      with_md1.abs
     end
   end
 
-  context "#sqrt" do
+  describe "#sqrt" do
     it "calculates sqrt" do
-      @with_md1.sqrt
+      with_md1.sqrt
     end
   end
 
-  context "#round" do
+  describe "#round" do
     it "rounds to given precision" do
-      @with_md1.round(2)
+      with_md1.round(2)
     end
   end
 end