掉进了个奇葩的js的坑

tests/leak.coffee

@@ -0,0 +1,78 @@
+#!/usr/bin/env coffee
+
+log = new (require 'log')('debug')
+
+class Group
+    on: (@callback)->        
+    dispatch: (msg)->
+        log.info 'dispatch',msg
+        @callback(msg) if @callback
+    cb: ->
+        @callback
+
+class Bot
+    constructor:(@list = [])->        
+        setInterval =>
+            o('bbb' ) for o in @list
+        ,500
+
+
+    listen_group : (name , callback) ->                
+          group = new Group()
+          @list.push group.dispatch
+          callback group
+
+
+### DEMO1
+bot = new Bot()
+# ggg = null
+bot.listen_group 'group', (group)->
+    group.on (msg)->
+        log.info '- received',msg
+    group.dispatch 'aaa'
+    
+    k = group.dispatch 
+    k('single')
+    # ggg = group
+###
+
+# ggg.dispatch 'ccc'    
+# 
+# setInterval ->
+#     ggg.dispatch 'ddd'
+# ,500
+
+###期待
+  dispatch
+  - receive
+  dispatch
+  - receive
+
+  实际结果
+  dispatch only
+
+  原因猜测
+  - js中没class概念 传给list的是个函数，破坏了里面的 this.xx 的概念
+
+### 
+
+
+
+# DEMO2
+group = new Group()
+group.on (msg)->
+    log.info '- received',msg
+
+group.dispatch 'kk'
+
+# obj    = group
+# method = group.dispatch
+
+group['dispatch'] 'str'
+
+
+
+
+
+
+