Add to_json for dataframe and series, as well as performance improvem…

…ents for .values in constructor

dist/__tests__/core/frame.js

@@ -384,12 +384,61 @@ describe('frame', function () {
           return "CREATEOBJECTURL";
         }
       };
-      // console.log(df.to_excel(new Workbook(), 'my test values', true));
+      df.to_excel(new _structs.Workbook(), 'my test values', true, { index: false });
 
       window.URL = originalURL;
     });
   });
 
+  describe('to_json', function () {
+    it('converts a pandas DataFrame to a json object when orient="columns"', function () {
+      var df = new _frame2.default(_immutable2.default.Map({ x: new _series2.default([1, 2, 3]), y: new _series2.default([2, 3, 4]) }));
+
+      var dfJSON = df.to_json();
+      expect(dfJSON).toEqual({ x: { 0: 1, 1: 2, 2: 3 }, y: { 0: 2, 1: 3, 2: 4 } });
+    });
+
+    it('converts a pandas DataFrame to a json object when orient="records"', function () {
+      var df = new _frame2.default(_immutable2.default.Map({ x: new _series2.default([1, 2, 3]), y: new _series2.default([2, 3, 4]) }));
+
+      var dfJSON = df.to_json({ orient: 'records' });
+      expect(dfJSON).toBeInstanceOf(Array);
+      expect(dfJSON[0]).toEqual({ x: 1, y: 2 });
+      expect(dfJSON[1]).toEqual({ x: 2, y: 3 });
+      expect(dfJSON[2]).toEqual({ x: 3, y: 4 });
+    });
+
+    it('converts a pandas DataFrame to a json object when orient="split"', function () {
+      var df = new _frame2.default(_immutable2.default.Map({ x: new _series2.default([1, 2, 3]), y: new _series2.default([2, 3, 4]) }));
+
+      var dfJSON = df.to_json({ orient: 'split' });
+      expect(dfJSON).toBeInstanceOf(Object);
+      expect(dfJSON.columns).toEqual(['x', 'y']);
+      expect(dfJSON.index).toEqual([0, 1, 2]);
+      expect(dfJSON.values).toEqual([[1, 2], [2, 3], [3, 4]]);
+    });
+
+    it('converts a pandas DataFrame to a json object when orient="index"', function () {
+      var df = new _frame2.default(_immutable2.default.Map({ x: new _series2.default([1, 2, 3]), y: new _series2.default([2, 3, 4]) }));
+
+      var dfJSON = df.to_json({ orient: 'index' });
+      expect(dfJSON).toBeInstanceOf(Object);
+      expect(dfJSON).toEqual({
+        0: { x: 1, y: 2 },
+        1: { x: 2, y: 3 },
+        2: { x: 3, y: 4 }
+      });
+    });
+
+    it('converts a pandas DataFrame to a json object when orient="values"', function () {
+      var df = new _frame2.default(_immutable2.default.Map({ x: new _series2.default([1, 2, 3]), y: new _series2.default([2, 3, 4]) }));
+
+      var dfJSON = df.to_json({ orient: 'values' });
+      expect(dfJSON).toBeInstanceOf(Object);
+      expect(dfJSON).toEqual([[1, 2], [2, 3], [3, 4]]);
+    });
+  });
+
   describe('where', function () {
     it('checks for equality of a scalar and returns a DataFrame', function () {
       var df = new _frame2.default([{ x: 1, y: 2 }, { x: 2, y: 3 }]);

dist/__tests__/core/series.js

@@ -594,5 +594,28 @@ describe('series', function () {
         }).toThrow();
       });
     });
+
+    describe('to_json', function () {
+      it('converts a pandas Series to a json object', function () {
+        var ds = new _series2.default([1, 2, 3, 4], { name: 'x' });
+
+        var dsJSON = ds.to_json();
+        expect(dsJSON).toEqual({ 0: 1, 1: 2, 2: 3, 3: 4 });
+      });
+
+      it('converts a pandas Series to a json object when orient="records"', function () {
+        var ds = new _series2.default([1, 2, 3, 4], { name: 'x' });
+
+        var dsJSON = ds.to_json({ orient: 'records' });
+        expect(dsJSON).toEqual([1, 2, 3, 4]);
+      });
+
+      it('converts a pandas Series to a json object when orient="split"', function () {
+        var ds = new _series2.default([1, 2, 3, 4], { name: 'x' });
+
+        var dsJSON = ds.to_json({ orient: 'split' });
+        expect(dsJSON).toEqual({ name: 'x', index: [0, 1, 2, 3], values: [1, 2, 3, 4] });
+      });
+    });
   });
 });