fix .once adding .on to the listener

bower.json

@@ -5,9 +5,6 @@
     "emitter",
     "events"
   ],
-  "dependencies": {
-    "indexof": "component/indexof#0.0.1"
-  },
   "version": "1.1.0",
   "license": "MIT",
   "main": "index.js",

component.json

@@ -3,9 +3,6 @@
   "repo": "component/emitter",
   "description": "Event emitter",
   "keywords": ["emitter", "events"],
-  "dependencies": {
-    "component/indexof": "*"
-  },
   "version": "1.1.0",
   "scripts": ["index.js"],
   "license": "MIT"

index.js

@@ -1,10 +1,4 @@
 
-/**
- * Module dependencies.
- */
-
-var index = require('indexof');
-
 /**
  * Expose `Emitter`.
  */
@@ -72,7 +66,7 @@ Emitter.prototype.once = function(event, fn){
     fn.apply(this, arguments);
   }
 
-  fn._off = on;
+  on.fn = fn;
   this.on(event, on);
   return this;
 };
@@ -110,8 +104,14 @@ Emitter.prototype.removeEventListener = function(event, fn){
   }
 
   // remove specific handler
-  var i = index(callbacks, fn._off || fn);
-  if (~i) callbacks.splice(i, 1);
+  var cb;
+  for (var i = 0; i < callbacks.length; i++) {
+    cb = callbacks[i];
+    if (cb === fn || cb.fn === fn) {
+      callbacks.splice(i, 1);
+      break;
+    }
+  }
   return this;
 };
 

package.json

@@ -2,9 +2,6 @@
   "name": "emitter-component",
   "description": "Event emitter",
   "version": "1.1.0",
-  "dependencies": {
-    "indexof": "0.0.1"
-  },
   "devDependencies": {
     "mocha": "*",
     "should": "*"

test/emitter.js

@@ -81,6 +81,7 @@ describe('Emitter', function(){
       function one() { calls.push('one'); }
 
       emitter.once('foo', one);
+      emitter.once('fee', one);
       emitter.off('foo', one);
 
       emitter.emit('foo');