Javascript/Coffeescript 中关于 this/@ 的谜题

Here's the code, first as Coffeescript then as Javascript:

// coffeescript
setName = (name) -> @name = name

setName 'Lulu'
console.log name
console.log @name

// Javascript via the coffee compiler
(function() {
  var setName;
  setName = function(name) {
    return this.name = name;
  };
  setName('Lulu');
  // console.log for node below - print for v8
  // uncomment one or the other depending on what you're trying
  // console.log(name);
  // console.log(this.name);
  // print(name);
  // print(this.name);
}).call(this);

结果如下:

$ coffee setName.coffee
Lulu
undefined

# coffee REPL
# This appears to be a bug in the REPL
# See https://github.com/jashkenas/coffee-script/issues/1444
coffee> setName = (name) -> @name = name
[Function]
coffee> setName 'Lulu'
'Lulu'
coffee> console.log name
ReferenceError: name is not defined
    at repl:2:1
    at Object.eval (/Users/telemachus/local/node-v0.4.8/lib/node_modules/coffee-script/lib/coffee-script.js:89:15)
    at Interface.<anonymous> (/Users/telemachus/local/node-v0.4.8/lib/node_modules/coffee-script/lib/repl.js:39:28)
    at Interface.emit (events.js:64:17)
    at Interface._onLine (readline.js:153:10)
    at Interface._line (readline.js:408:8)
    at Interface._ttyWrite (readline.js:585:14)
    at ReadStream.<anonymous> (readline.js:73:12)
    at ReadStream.emit (events.js:81:20)
    at ReadStream._emitKey (tty_posix.js:307:10)

coffee> console.log @name
undefined

$ v8 setName.js
Lulu
Lulu

# v8 REPL
>> (function(){var setName; setName=function(name){return this.name=name;};setName('Lulu');print(name);print(this.name);}).call(this);
Lulu
Lulu

# Switch print to console.log or require puts from sys
$ node setName.js
Lulu
undefined

# node REPL
> (function() {
...   var setName;
...   setName = function(name) {
...     return this.name = name;
...   };
...   setName('Lulu');
...    console.log(name);
...    console.log(this.name);
... }).call(this);
Lulu
Lulu

所以我想，真正的问题是 (1) 我应该期待什么结果以及 (2) 为什么这些解释器和 REPL 不能相处?(我的理论是 v8 是正确的:在全局上下文中，name 和 this.name 应该是同一件事，我想.但我已经准备好了相信我不懂 Javascript 中的 this.)

console.log this is exports
console.log do -> this is global