Return unique row as data on step function (#500)

papaparse.js

@@ -1649,10 +1649,11 @@ if (!Array.isArray)
 			}
 
 			/** Returns an object with the results, errors, and meta. */
-			function returnable(stopped)
+			function returnable(stopped, step)
 			{
+				var isStep = step || false;
 				return {
-					data: data,
+					data: isStep ? data[0]  : data,
 					errors: errors,
 					meta: {
 						delimiter: delim,
@@ -1667,7 +1668,7 @@ if (!Array.isArray)
 			/** Executes the user's step function and resets data & errors. */
 			function doStep()
 			{
-				step(returnable());
+				step(returnable(undefined, true));
 				data = [];
 				errors = [];
 			}

tests/test-cases.js

@@ -1735,7 +1735,7 @@ var CUSTOM_TESTS = [
 		run: function(callback) {
 			Papa.parse('A,b,c', {
 				step: function(response) {
-					callback(response.data[0]);
+					callback(response.data);
 				}
 			});
 		}
@@ -1972,7 +1972,7 @@ var CUSTOM_TESTS = [
 			var updates = [];
 			Papa.parse('A,b,c\nd,E,f\nG,h,i', {
 				step: function(response, handle) {
-					updates.push(response.data[0]);
+					updates.push(response.data);
 					handle.abort();
 					callback(updates);
 				},
@@ -2002,7 +2002,7 @@ var CUSTOM_TESTS = [
 			var updates = [];
 			Papa.parse('A,b,c\nd,E,f\nG,h,i', {
 				step: function(response, handle) {
-					updates.push(response.data[0]);
+					updates.push(response.data);
 					handle.pause();
 					callback(updates);
 				},
@@ -2021,7 +2021,7 @@ var CUSTOM_TESTS = [
 			var first = true;
 			Papa.parse('A,b,c\nd,E,f\nG,h,i', {
 				step: function(response, h) {
-					updates.push(response.data[0]);
+					updates.push(response.data);
 					if (!first) return;
 					handle = h;
 					handle.pause();