Multiple identical arguments to satisfy a list option

[ganeshv]

Giving multiple identical arguments to something like [<item>...] returns only one instance of the argument. python docopt does the right thing. Example:

usage = """
Usage:
    echo [<item>...]
"""
{docopt} = require '../docopt'
console.log docopt(usage, version: '2.0')

Now, coffee bug.coffee a a a returns
{ '<item>': [ 'a' ] }
whereas it really ought to return
{ '<item>': [ 'a', 'a', 'a' ] }

The problem is with this line in the Argument class:
left = (l for l in left when l.toString() isnt args[0].toString())
which will take out every instance matching args[0] when it really ought to remove only the first one, like in the python implementation.

I changed it as follows to make it work

-        left = (l for l in left when l.toString() isnt args[0].toString())
+        idx = left.indexOf args[0]
+        left = left.slice(0, idx).concat(left.slice(idx + 1))

but I don't know coffeescript so maybe there's a better way of doing it.

[valeriangalliat]

I also encountered this issue when two arguments have the same value, for example:

Usage: foo [options] <input> <output>

Options:
  --test

The program will exit and show help if I call it with foo test test, but will work with foo --test test test or foo test something.