Patch version bump

Closes #592

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "papaparse",
-	"version": "4.6.2",
+	"version": "4.6.3",
 	"description": "Fast and powerful CSV parser for the browser that supports web workers and streaming large files. Converts CSV to JSON and JSON to CSV.",
 	"keywords": [
 		"csv",

papaparse.js

@@ -1,6 +1,6 @@
 /* @license
 Papa Parse
-v4.6.2
+v4.6.3
 https://github.com/mholt/PapaParse
 License: MIT
 */
@@ -296,7 +296,7 @@ if (!Array.isArray)
 
 		unpackConfig();
 
-		var quoteCharRegex = new RegExp(_quoteChar, 'g');
+		var quoteCharRegex = new RegExp(escapeRegExp(_quoteChar), 'g');
 
 		if (typeof _input === 'string')
 			_input = JSON.parse(_input);
@@ -1266,7 +1266,7 @@ if (!Array.isArray)
 
 					if (typeof fieldCountPrevRow === 'undefined')
 					{
-						fieldCountPrevRow = fieldCount;
+						fieldCountPrevRow = 0;
 						continue;
 					}
 					else if (fieldCount > 1)
@@ -1279,7 +1279,7 @@ if (!Array.isArray)
 				if (preview.data.length > 0)
 					avgFieldCount /= (preview.data.length - emptyLinesCount);
 
-				if ((typeof bestDelta === 'undefined' || delta < bestDelta)
+				if ((typeof bestDelta === 'undefined' || delta > bestDelta)
 					&& avgFieldCount > 1.99)
 				{
 					bestDelta = delta;
@@ -1438,7 +1438,7 @@ if (!Array.isArray)
 
 			var nextDelim = input.indexOf(delim, cursor);
 			var nextNewline = input.indexOf(newline, cursor);
-			var quoteCharRegex = new RegExp(escapeChar.replace(/[-[\]/{}()*+?.\\^$|]/g, '\\$&') + quoteChar, 'g');
+			var quoteCharRegex = new RegExp(escapeRegExp(escapeChar) + escapeRegExp(quoteChar), 'g');
 			var quoteSearch;
 
 			// Parser loop

tests/test-cases.js

@@ -1159,6 +1159,16 @@ var PARSE_TESTS = [
 			errors: []
 		}
 	},
+	{
+		description: "Pipe delimiter is guessed correctly when mixed with comas",
+		notes: "Guessing the delimiter should work even if there are many lines of comments at the start of the file",
+		input: 'one|two,two|three\nfour|five,five|six',
+		config: {},
+		expected: {
+			data: [['one','two,two','three'],['four','five,five','six']],
+			errors: []
+		}
+	},
 	{
 		description: "Single quote as quote character",
 		notes: "Must parse correctly when single quote is specified as a quote character",
@@ -1324,7 +1334,7 @@ var PARSE_TESTS = [
 		}
 	},
 	{
-		description: "Using reserved regex characters as quote characters",
+		description: "Using reserved regex character . as quote character",
 		input: '.a\na.,b\r\nc,d\r\ne,f\r\ng,h\r\ni,j',
 		config: { quoteChar: '.' },
 		expected: {
@@ -1339,6 +1349,22 @@ var PARSE_TESTS = [
 			}
 		}
 	},
+	{
+		description: "Using reserved regex character | as quote character",
+		input: '|a\na|,b\r\nc,d\r\ne,f\r\ng,h\r\ni,j',
+		config: { quoteChar: '|' },
+		expected: {
+			data: [['a\na', 'b'], ['c', 'd'], ['e', 'f'], ['g', 'h'], ['i', 'j']],
+			errors: [],
+			meta: {
+				linebreak: '\r\n',
+				delimiter: ',',
+				cursor: 27,
+				aborted: false,
+				truncated: false
+			}
+		}
+	},
 	{
 		description: "Parsing with skipEmptyLines set to 'greedy'",
 		notes: "Must parse correctly without lines with no content",