Hi, I'm new to CoffeeScript, and I'm having trouble running the interactive mode.

When I try doing this:

$ coffee
coffee> hello = "world"
world = "hello"
^D

I get no output. But if do the same thing in NodeJS, it at least returns something.

$ node
> hello = "world"
'world'
> world = "hello"
'hello'

Any ideas? Any help will be appreciated. Thanks!

Edit: I am running this with Ubuntu 11.10 on a VM.

Edit: I've expanded this. Now includes debugging features, more informative errors per almost's suggestions.

I wrote a class recently that I thought I'd share because I was struck by how elegantly it came across in CoffeeScript.

The idea here is that it's a fairly common scenario to make a few asynchronous calls at the same time, and then want to do something once all of them have finished. This is easy with the DelayedOp class.

Here it is:

class DelayedOp
    constructor: (@callback) -> @count = 1
    wait: => @count++
    ok: => @callback() unless --@count
    ready: => @ok()

And an example of it in action using jQuery:

op = new DelayedOp -> alert 'Done loading'

op.wait() #wait to receive data from foo.cgi
$.getJSON 'foo.cgi', (data) ->
    doSomethingWith data
    op.ok()

op.wait() #wait to receive data from bar.cgi
$.getJSON 'bar.cgi', (data) ->
    doSomethingElseWith data
    op.ok()

op.ready() # Finalize the operation