Add support for specifying a separator

Closes GH-2

Author: muraken720

index.js

@@ -15,13 +15,17 @@
  *
  * @param {NLCSTNode|Array.<NLCSTNode>} node - Node to to
  *   stringify.
+ * @param {string} separator - Value to separate each item
+ *   with.
  * @return {string} - Stringified `node`.
  */
-function nlcstToString(node) {
+function nlcstToString(node, separator) {
     var values;
     var length;
     var children;
 
+    separator = separator || '';
+
     if (typeof node.value === 'string') {
         return node.value;
     }
@@ -40,10 +44,10 @@ function nlcstToString(node) {
     values = [];
 
     while (length--) {
-        values[length] = nlcstToString(children[length]);
+        values[length] = nlcstToString(children[length], separator);
     }
 
-    return values.join('');
+    return values.join(separator);
 }
 
 /*

nlcst-to-string.js

@@ -16,13 +16,17 @@
  *
  * @param {NLCSTNode|Array.<NLCSTNode>} node - Node to to
  *   stringify.
+ * @param {string} separator - Value to separate each item
+ *   with.
  * @return {string} - Stringified `node`.
  */
-function nlcstToString(node) {
+function nlcstToString(node, separator) {
     var values;
     var length;
     var children;
 
+    separator = separator || '';
+
     if (typeof node.value === 'string') {
         return node.value;
     }
@@ -41,10 +45,10 @@ function nlcstToString(node) {
     values = [];
 
     while (length--) {
-        values[length] = nlcstToString(children[length]);
+        values[length] = nlcstToString(children[length], separator);
     }
 
-    return values.join('');
+    return values.join(separator);
 }
 
 /*

nlcst-to-string.min.js

@@ -53,15 +53,15 @@ AT&T
 
 ## API
 
-### toString(node)
+### toString(node\[, separator\])
 
 Stringify an [NLCST](https://github.com/wooorm/nlcst) [node](https://github.com/wooorm/nlcst#node)
 (or an array of NLCST nodes).
 
 **Signatures**
 
-*   `toString(node)`;
-*   `toString(nodes)`.
+*   `toString(node[, separator])`;
+*   `toString(nodes[, separator])`.
 
 **Parameters**
 
@@ -70,6 +70,9 @@ Stringify an [NLCST](https://github.com/wooorm/nlcst) [node](https://github.com/
 
 *   `nodes` (`Array.<NLCSTNode>`) — Nodes to to stringify.
 
+*   `separator` (`string`, optional, default: `''`) — Value to separate
+    each item with.
+
 **Returns**
 
 `string` — Stringified `node` / `nodes`.

readme.md

@@ -104,4 +104,37 @@ describe('toString()', function () {
             }
         ]), 'AT&T');
     });
+
+    it('should concatenate `children` with a separator', function () {
+        equal(toString({
+            'children': [
+                {
+                    'children': [
+                        {
+                            'value': 'AT'
+                        },
+                        {
+                            'value': '&'
+                        },
+                        {
+                            'value': 'T'
+                        }
+                    ]
+                },
+                {
+                    'children': [
+                        {
+                            'value': 'AT'
+                        },
+                        {
+                            'value': '&'
+                        },
+                        {
+                            'value': 'T'
+                        }
+                    ]
+                }
+            ]
+        }, ' '), 'AT & T AT & T');
+    });
 });