Improve code.

lib/Curl.js

@@ -1,6 +1,6 @@
 // Generated by ToffeeScript 1.4.0
 (function() {
-  var Curl, curls, id, m, p;
+  var Curl, id, m, p;
 
   try {
     Curl = require(__dirname + '/../build/Release/node-curl').Curl;
@@ -8,10 +8,6 @@
     Curl = require(__dirname + '/../build/default/node-curl').Curl;
   }
 
-  curls = {};
-
-  id = 0;
-
   Curl.prototype.setopt_user_ = function(option_id, value) {
     return this.options[option_id] = value;
   };
@@ -58,26 +54,15 @@
   };
 
   Curl.prototype.on = function(event, callback) {
-    var _this = this;
     switch (event) {
       case 'data':
         this.on_write = callback;
         break;
       case 'error':
-        this.on_error = function() {
-          var rt;
-          rt = callback();
-          curls[_this.id] = null;
-          return rt;
-        };
+        this.on_error = callback;
         break;
       case 'end':
-        this.on_end = function() {
-          var rt;
-          rt = callback();
-          curls[_this.id] = null;
-          return rt;
-        };
+        this.on_end = callback;
         break;
       default:
         throw new Error("invalid event type " + event);
@@ -85,9 +70,14 @@
     return this;
   };
 
+  Curl.prototype.close = function() {
+    return this.close_();
+  };
+
+  id = 0;
+
   Curl.prototype.perform = function() {
     this.id = ++id;
-    curls[this.id] = this;
     this.perform_();
     Curl.process();
     return this;