From 7dcced87d1ab53a7e09b5f12c96ddf5c67935c90 Mon Sep 17 00:00:00 2001
From: jaymeans <monkeydzeke@protonmail.com>
Date: Mon, 13 Aug 2018 23:31:39 -0700
Subject: [PATCH] got test passing with new functionality

---
 papaparse.js | 34 +++++++++++++++++++++-------------
 1 file changed, 21 insertions(+), 13 deletions(-)

diff --git a/papaparse.js b/papaparse.js
index 67f5e2e..d67dfae 100755
--- a/papaparse.js
+++ b/papaparse.js
@@ -280,6 +280,9 @@
 		/** quote character */
 		var _quoteChar = '"';
 
+		/** whether to skip empty lines */
+		var _skipEmptyLines = false;
+
 		unpackConfig();
 
 		var quoteCharRegex = new RegExp(_quoteChar, 'g');
@@ -290,9 +293,9 @@
 		if (_input instanceof Array)
 		{
 			if (!_input.length || _input[0] instanceof Array)
-				return serialize(null, _input);
+				return serialize(null, _input, _skipEmptyLines === 'greedy');
 			else if (typeof _input[0] === 'object')
-				return serialize(objectKeys(_input[0]), _input);
+				return serialize(objectKeys(_input[0]), _input, _skipEmptyLines === 'greedy');
 		}
 		else if (typeof _input === 'object')
 		{
@@ -313,7 +316,7 @@
 					_input.data = [_input.data];	// handles input like [1,2,3] or ['asdf']
 			}
 
-			return serialize(_input.fields || [], _input.data || []);
+			return serialize(_input.fields || [], _input.data || [], _skipEmptyLines === 'greedy');
 		}
 
 		// Default (any valid paths should return before this)
@@ -335,6 +338,10 @@
 				|| _config.quotes instanceof Array)
 				_quotes = _config.quotes;
 
+			if (typeof _config.skipEmptyLines === 'boolean'
+				|| typeof _config.skipEmptyLines === 'string')
+				_skipEmptyLines = _config.skipEmptyLines;
+
 			if (typeof _config.newline === 'string')
 				_newline = _config.newline;
 
@@ -358,7 +365,7 @@
 		}
 
 		/** The double for loop that iterates the data and writes out a CSV string including header row */
-		function serialize(fields, data)
+		function serialize(fields, data, greedySkip)
 		{
 			var csv = '';
 
@@ -388,18 +395,19 @@
 			{
 				var maxCol = hasHeader ? fields.length : data[row].length;
 
-				for (var col = 0; col < maxCol; col++)
+				if (!greedySkip || data[row].join('').trim() !== '')
 				{
-					if (col > 0)
-						csv += _delimiter;
-					var colIdx = hasHeader && dataKeyedByField ? fields[col] : col;
-					csv += safe(data[row][colIdx], col);
+					for (var col = 0; col < maxCol; col++)
+					{
+						if (col > 0)
+							csv += _delimiter;
+						var colIdx = hasHeader && dataKeyedByField ? fields[col] : col;
+						csv += safe(data[row][colIdx], col);
+					}
+					if (row < data.length - 1)
+						csv += _newline;
 				}
-
-				if (row < data.length - 1)
-					csv += _newline;
 			}
-
 			return csv;
 		}