variable undefined evaluating a coffeescript string

Question

The following works from the coffeescript REPL but it doesn't work if I put it in a file and run it. It says that "a is not defined".

Coffee = require 'coffee-script'
a = {b: 1}
console.log Coffee.eval('a.b')

Any ideas how to get this to work as a script? I couldn't find any documentation on .eval .

Answer 1

Looking around at the source code , it appears we can use a sandbox option to set the context. This works:

Coffee = require 'coffee-script'
a = {b: 1}
console.log Coffee.eval('a.b', {sandbox:{a}})