Fix ignoreEmpty=false to keep empty header columns

src/lineToJson.ts

@@ -37,10 +37,14 @@ function processRow(row: string[], conv: Converter, index): JSONResult | null {
 function convertRowToJson(row: string[], headRow: string[], conv: Converter): { [key: string]: any } | null {
   let hasValue = false;
   const resultRow = {};
+  let len = row.length;
+  if (!conv.parseParam.ignoreEmpty && len > 0 && headRow.length > len) {
+    len = headRow.length;
+  }
 
-  for (let i = 0, len = row.length; i < len; i++) {
-    let item = row[i];
-
+  for (let i = 0; i < len; i++) {
+    let item = row[i] ?? '';
+ 
     if (conv.parseParam.ignoreEmpty && item === '') {
       continue;
     }

test/data/dataEmptyColumns

@@ -0,0 +1,3 @@
+col1,col2,col3
+a,b
+c,d

test/testCSVConverter.ts

@@ -304,6 +304,20 @@ describe("CSV Converter", function () {
     });
   });
 
+  it("should keep empty columns when ignoreEmpty is false", function (done) {
+    var testData = __dirname + "/data/dataEmptyColumns";
+    var rs = fs.createReadStream(testData);
+    var st = rs.pipe(csv({ ignoreEmpty: false }));
+    st.then(function (res) {
+      assert(res.length === 2);
+      assert.equal(res[0].col1, "a");
+      assert.equal(res[0].col2, "b");
+      assert.equal(res[0].col3, "");
+      assert.equal(res[1].col3, "");
+      done();
+    });
+  }); 
+
   it("should allow no header", function (done) {
     var testData = __dirname + "/data/noheadercsv";
     var rs = fs.createReadStream(testData);

v2/lineToJson.js

@@ -34,11 +34,15 @@ function processRow(row, conv, index) {
 function convertRowToJson(row, headRow, conv) {
     var hasValue = false;
     var resultRow = {};
-    for (var i = 0, len = row.length; i < len; i++) {
-        var item = row[i];
+    var len = row.length;
+    if (!conv.parseParam.ignoreEmpty && len > 0 && headRow.length > len) {
+        len = headRow.length;
+    }
+    for (var i = 0; i < len; i++) {
+        var item = row[i] !== null && row[i] !== void 0 ? row[i] : '';
         if (conv.parseParam.ignoreEmpty && item === '') {
             continue;
-        }
+        } 
         hasValue = true;
         var head = headRow[i];
         if (!head || head === "") {