Add option to disable decycling

Author: Faleij

README.md

@@ -14,6 +14,7 @@ JSON Stringify as a Readable Stream with rescursive resolving of any readable st
 - Streams (ObjectMode) are piped through a transform which pipes the data through JSONStreamStreamify (enabling recursive resolving)
 - Streams (Non-ObjectMode) is stringified and piped
 - Output is streamed optimally with as small chunks as possible
+- Decycling using Douglas Crockfords Cycle algorithm
 - Great memory management with reference release post process (When a key and value has been processed the value is dereferenced)
 - Stream pressure handling
 
@@ -25,10 +26,12 @@ npm install --save json-stream-stringify
 
 ## API
 
-### JSONStreamStringify(value[, replacer])  
+### JSONStreamStringify(value[, replacer[, spaces[, noDecycle]]])  
 Convert value to JSON string. Returns a readable stream.
 - ``value`` Any data to convert to JSON.
 - ``replacer`` Optional ``Function(key, value)`` or ``Array``.  
+- ``spaces`` Optional ``String`` or ``Number`` **Not yet implemented**
+- ``noDecycle`` Optional ``Boolean`` Set to ``true`` to disable decycling.
  As a function the returned value replaces the value associated with the key.  [Details](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#The_replacer_parameter)  
  As an array all other keys are filtered. [Details](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#Example_with_an_array)
 

jsonStreamify.js

@@ -15,8 +15,6 @@ class JSONStreamify extends CoStream {
     * _makeGenerator(value, replacer) {
         let insertSeparator = false;
         for (let obj of this._iter) {
-            //console.log(obj, insertSeparator);
-
             if (obj.state === 'close') {
                 insertSeparator = true;
                 yield this.push(obj.type === Object ? '}' : ']');
@@ -97,6 +95,6 @@ class JSONStreamify extends CoStream {
     }
 }
 
-module.exports = function(obj, replacer) {
-    return new JSONStreamify(obj, replacer);
+module.exports = function (value, replacer, space, noDecycle) {
+    return new JSONStreamify(value, replacer, space, noDecycle ? { has: () => false, set: () => undefined } : undefined);
 };