# v0.4.2

* Added ability to specify a rowDelimiter when creating a csv. * Added discardUnmappedColumns option to allow the ignoring of extra data C2FO#45
doug-martin · Aug 3, 2014 · ca43ee5 · ca43ee5
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diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,5 @@
 language: node_js
 node_js:
-  - 0.1
+  - "0.10"
 before_script:
   - npm install -g grunt-cli
diff --git a/History.md b/History.md
@@ -1,6 +1,11 @@
+# v0.4.2
+
+* Added ability to specify a rowDelimiter when creating a csv.
+* Added discardUnmappedColumns option to allow the ignoring of extra data [#45](https://github.com/C2FO/fast-csv/pull/45)
+
 # v0.4.1
 
-* Fixed race condition that occured if you called pause during a flush.
+* Fixed race condition that occurred if you called pause during a flush.
 
 # v0.4.0
 

diff --git a/README.md b/README.md
@@ -216,6 +216,7 @@ csv
 Formatting accepts the same options as parsing with an additional `transform` option.
 
 * `transform(row)`: A function that accepts a row and returns a transformed one to be written.
+* `rowDelimiter='\n'`: Specify an alternate row delimiter (i.e `\r\n`)
 
 **`createWriteStream(options)`**
 

diff --git a/docs/History.html b/docs/History.html
@@ -176,9 +176,14 @@
 
 
 
+<h1>v0.4.2</h1>
+<ul>
+<li>Added ability to specify a rowDelimiter when creating a csv.</li>
+<li>Added discardUnmappedColumns option to allow the ignoring of extra data <a href="https://github.com/C2FO/fast-csv/pull/45">#45</a></li>
+</ul>
 <h1>v0.4.1</h1>
 <ul>
-<li>Fixed race condition that occured if you called pause during a flush.</li>
+<li>Fixed race condition that occurred if you called pause during a flush.</li>
 </ul>
 <h1>v0.4.0</h1>
 <ul>

diff --git a/docs/index.html b/docs/index.html
@@ -190,6 +190,7 @@ <h3>Parsing</h3>
 <li><code>objectMode=true</code>: Ensure that <code>data</code> events have an object emitted rather than the stringified version set to false to have a stringified buffer.</li>
 <li><code>headers=false</code>: Ste to true if you expect the first line of your <code>CSV</code> to contain headers, alternatly you can specify an array of headers to use.</li>
 <li><code>ignoreEmpty=false</code>: If you wish to ignore empty rows.</li>
+<li><code>discardUnmappedColumns=false</code>: If you want to discard columns that do not map to a header.</li>
 <li><code>delimiter=&#39;,&#39;</code>: If your data uses an alternate delimiter such as <code>;</code> or <code>\t</code>.<ul>
 <li><strong>NOTE</strong> When specifying an alternate <code>delimiter</code> you may only pass in a single character delimiter</li>
 </ul>
@@ -218,7 +219,7 @@ <h3>Parsing</h3>
 
 var csvStream = csv()
  .on(&quot;record&quot;, function(data){
-     console.log(data):
+     console.log(data);
  })
  .on(&quot;end&quot;, function(){
      console.log(&quot;done&quot;);
@@ -232,7 +233,7 @@ <h3>Parsing</h3>
 csv
  .fromPath(&quot;my.csv&quot;)
  .on(&quot;record&quot;, function(data){
-     console.log(data):
+     console.log(data);
  })
  .on(&quot;end&quot;, function(){
      console.log(&quot;done&quot;);
@@ -246,9 +247,9 @@ <h3>Parsing</h3>
                  &#39;a2,b2\n&#39;;
 
 csv
- .fromPath(CSV_STRING, {headers: true})
+ .fromString(CSV_STRING, {headers: true})
  .on(&quot;record&quot;, function(data){
-     console.log(data):
+     console.log(data);
  })
  .on(&quot;end&quot;, function(){
      console.log(&quot;done&quot;);
@@ -260,7 +261,7 @@ <h3>Parsing</h3>
 csv()
  .fromStream(stream)
  .on(&quot;record&quot;, function(data){
-     console.log(data):
+     console.log(data);
  })
  .on(&quot;end&quot;, function(){
      console.log(&quot;done&quot;);
@@ -272,7 +273,7 @@ <h3>Parsing</h3>
 csv()
  .fromStream(stream, {headers : true})
  .on(&quot;record&quot;, function(data){
-     console.log(data):
+     console.log(data);
  })
  .on(&quot;end&quot;, function(){
      console.log(&quot;done&quot;);
@@ -284,7 +285,7 @@ <h3>Parsing</h3>
 csv
  .fromStream(stream, {headers : [&quot;firstName&quot;, &quot;lastName&quot;, &quot;address&quot;]})
  .on(&quot;record&quot;, function(data){
-     console.log(data):
+     console.log(data);
  })
  .on(&quot;end&quot;, function(){
      console.log(&quot;done&quot;);
@@ -297,7 +298,7 @@ <h3>Parsing</h3>
 csv
  .fromStream(stream, {ignoreEmpty: true})
  .on(&quot;record&quot;, function(data){
-     console.log(data):
+     console.log(data);
  })
  .on(&quot;end&quot;, function(){
      console.log(&quot;done&quot;);
@@ -316,7 +317,7 @@ <h3>Validating</h3>
      //do something with invalid row
  })
  .on(&quot;record&quot;, function(data){
-     console.log(data):
+     console.log(data);
  })
  .on(&quot;end&quot;, function(){
      console.log(&quot;done&quot;);
@@ -332,7 +333,7 @@ <h3>Transforming</h3>
      return data.reverse(); //reverse each row.
  })
  .on(&quot;record&quot;, function(data){
-     console.log(data):
+     console.log(data);
  })
  .on(&quot;end&quot;, function(){
      console.log(&quot;done&quot;);
@@ -342,6 +343,7 @@ <h3>Formatting</h3>
 <p>Formatting accepts the same options as parsing with an additional <code>transform</code> option.</p>
 <ul>
 <li><code>transform(row)</code>: A function that accepts a row and returns a transformed one to be written.</li>
+<li><code>rowDelimiter=&#39;\n&#39;</code>: Specify an alternate row delimiter (i.e <code>\r\n</code>)</li>
 </ul>
 <p><strong><code>createWriteStream(options)</code></strong></p>
 <p>This is the lowest level of the write methods, it creates a stream that can be used to create a csv of unknown size and pipe to an output csv.</p>
@@ -530,7 +532,7 @@ <h2>Piping from Parser to Writer</h2>
                 emailAddress: obj.Email_Address,
                 verified: obj.Verified
             };
-        });  
+        });
 csv
    .fromPath(&quot;in.csv&quot;, {headers: true})
    .pipe(formatStream)

diff --git a/lib/formatter.js b/lib/formatter.js
@@ -52,6 +52,7 @@ function __write(writer, arr, options) {
     var formatter = createFormatter(options),
         transformer = extended.has(options, "transform") ? options.transform : defaultTransform,
         hasHeaders = extended.has(options, "headers") ? options.headers : true,
+        rowDelimiter = options.rowDelimiter || LINE_BREAK,
         headersLength = 0,
         i = -1,
         j = -1,
@@ -87,7 +88,7 @@ function __write(writer, arr, options) {
             }
             ret.push(formatter(vals));
         }
-        writer.push(ret.join(LINE_BREAK));
+        writer.push(ret.join(rowDelimiter));
     }
 }
 
@@ -97,6 +98,7 @@ function CsvTransformStream(options) {
     options = options || {};
     Transform.call(this, options);
     this.formatter = createFormatter(options);
+    this.rowDelimiter = options.rowDelimiter || "\n";
     var hasHeaders = this.hasHeaders = extended.has(options, "headers") ? options.headers : true;
     this.parsedHeaders = hasHeaders ? false : true;
     this.buffer = [];
@@ -134,7 +136,7 @@ extended(CsvTransformStream).extend({
                 }
             }
             if (this.totalCount++) {
-                buffer.push("\n");
+                buffer.push(this.rowDelimiter);
             }
             if (isHash) {
                 var i = -1, headersLength = this.headersLength;

diff --git a/package.json b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "fast-csv",
-  "version": "0.4.1",
+  "version": "0.4.2",
   "description": "CSV parser and writer",
   "main": "index.js",
   "scripts": {

diff --git a/test/fast-csv.test.js b/test/fast-csv.test.js
@@ -754,6 +754,16 @@ it.describe("fast-csv", function (it) {
                 }
             }), "A,B\na1,b1\na2,b2");
         });
+
+        it.should("support specifying an alternate row delimiter", function () {
+            assert.equal(csv.writeToString([
+                {a: "a1", b: "b1"},
+                {a: "a2", b: "b2"}
+            ], {
+                headers: true,
+                rowDelimiter: '\r\n'
+            }), "a,b\r\na1,b1\r\na2,b2");
+        });
     });
 
     it.describe(".write", function (it) {
@@ -824,6 +834,18 @@ it.describe("fast-csv", function (it) {
                 }
             }).on("error", next).pipe(ws);
         });
+
+        it.should("support specifying an alternate row delimiter", function (next) {
+            var ws = new stream.Writable();
+            ws._write = function (data) {
+                assert.deepEqual(data.toString(), "a,b\r\na1,b1\r\na2,b2");
+                next();
+            };
+            csv.write([
+                {a: "a1", b: "b1"},
+                {a: "a2", b: "b2"}
+            ], {headers: true, rowDelimiter: '\r\n'}).on("error", next).pipe(ws);
+        });
     });
 
     it.describe(".writeToPath", function (it) {
@@ -902,6 +924,20 @@ it.describe("fast-csv", function (it) {
                     next();
                 });
         });
+
+        it.should("support specifying an alternate row delimiter", function (next) {
+            csv
+                .writeToPath(path.resolve(__dirname, "assets/test.csv"), [
+                    {a: "a1", b: "b1"},
+                    {a: "a2", b: "b2"}
+                ], {headers: true, rowDelimiter: '\r\n'})
+                .on("error", next)
+                .on("finish", function () {
+                    assert.equal(fs.readFileSync(path.resolve(__dirname, "assets/test.csv")).toString(), "a,b\r\na1,b1\r\na2,b2");
+                    fs.unlinkSync(path.resolve(__dirname, "assets/test.csv"));
+                    next();
+                });
+        });
     });
 
     it.describe(".createWriteStream", function (it) {
@@ -976,49 +1012,72 @@ it.describe("fast-csv", function (it) {
             });
             stream.write(null);
         });
-    });
 
-    it.describe("piping from parser to formatter", function (it) {
-
-        it.should("allow piping from a parser to a formatter", function (next) {
+        it.should("support specifying an alternate row delimiter", function (next) {
             var writable = fs.createWriteStream(path.resolve(__dirname, "assets/test.csv"), {encoding: "utf8"});
-            csv
-                .fromPath(path.resolve(__dirname, "./assets/test22.csv"), {headers: true, objectMode: true})
-                .on("error", next)
-                .pipe(csv.createWriteStream({headers: true}))
-                .on("error", next)
-                .pipe(writable)
+            var stream = csv
+                .createWriteStream({headers: true, rowDelimiter: '\r\n'})
                 .on("error", next);
-
             writable
                 .on("finish", function () {
-                    assert.equal(fs.readFileSync(path.resolve(__dirname, "assets/test.csv")).toString(), "a,b\na1,b1\na2,b2");
+                    assert.equal(fs.readFileSync(path.resolve(__dirname, "assets/test.csv")).toString(), "a,b\r\na1,b1\r\na2,b2");
                     fs.unlinkSync(path.resolve(__dirname, "assets/test.csv"));
                     next();
                 });
+            stream.pipe(writable);
+            var vals = [
+                {a: "a1", b: "b1"},
+                {a: "a2", b: "b2"}
+            ];
+            vals.forEach(function (item) {
+                stream.write(item);
+            });
+            stream.write(null);
         });
 
-        it.should("preserve transforms", function (next) {
-            var writable = fs.createWriteStream(path.resolve(__dirname, "assets/test.csv"), {encoding: "utf8"});
-            csv
-                .fromPath(path.resolve(__dirname, "./assets/test22.csv"), {headers: true})
-                .transform(function (obj) {
-                    obj.a = obj.a + "-parsed";
-                    obj.b = obj.b + "-parsed";
-                    return obj;
-                })
-                .on("error", next)
-                .pipe(csv.createWriteStream({headers: true}))
-                .on("error", next)
-                .pipe(writable)
-                .on("error", next);
 
-            writable
-                .on("finish", function () {
-                    assert.equal(fs.readFileSync(path.resolve(__dirname, "assets/test.csv")).toString(), "a,b\na1-parsed,b1-parsed\na2-parsed,b2-parsed");
-                    fs.unlinkSync(path.resolve(__dirname, "assets/test.csv"));
-                    next();
-                });
+        it.describe("piping from parser to formatter", function (it) {
+
+            it.should("allow piping from a parser to a formatter", function (next) {
+                var writable = fs.createWriteStream(path.resolve(__dirname, "assets/test.csv"), {encoding: "utf8"});
+                csv
+                    .fromPath(path.resolve(__dirname, "./assets/test22.csv"), {headers: true, objectMode: true})
+                    .on("error", next)
+                    .pipe(csv.createWriteStream({headers: true}))
+                    .on("error", next)
+                    .pipe(writable)
+                    .on("error", next);
+
+                writable
+                    .on("finish", function () {
+                        assert.equal(fs.readFileSync(path.resolve(__dirname, "assets/test.csv")).toString(), "a,b\na1,b1\na2,b2");
+                        fs.unlinkSync(path.resolve(__dirname, "assets/test.csv"));
+                        next();
+                    });
+            });
+
+            it.should("preserve transforms", function (next) {
+                var writable = fs.createWriteStream(path.resolve(__dirname, "assets/test.csv"), {encoding: "utf8"});
+                csv
+                    .fromPath(path.resolve(__dirname, "./assets/test22.csv"), {headers: true})
+                    .transform(function (obj) {
+                        obj.a = obj.a + "-parsed";
+                        obj.b = obj.b + "-parsed";
+                        return obj;
+                    })
+                    .on("error", next)
+                    .pipe(csv.createWriteStream({headers: true}))
+                    .on("error", next)
+                    .pipe(writable)
+                    .on("error", next);
+
+                writable
+                    .on("finish", function () {
+                        assert.equal(fs.readFileSync(path.resolve(__dirname, "assets/test.csv")).toString(), "a,b\na1-parsed,b1-parsed\na2-parsed,b2-parsed");
+                        fs.unlinkSync(path.resolve(__dirname, "assets/test.csv"));
+                        next();
+                    });
+            });
         });
     });
-});
+});