javascript exception object format

Question

By default, Node.js throws the following exception when a file is not found.

{ [Error: ENOENT, no such file or directory \'InvalidFile\']
  errno: 34,
  code: \'         


        

Answer 1

I'm answering subquestion #2. The accepted answer, though excellent, seems to omit it.

On Node, the [Error: ...] element can be accessed as .stack on the exception object. It's a string, which you can then parse with regular expressions to get, for instance, the module and line number.

For instance, you could parse the first stack frame like this:

...
} catch (e) {
    var msg, file, line, col;
    [msg,file,col] = e.stack.match(/\((.*):(\d+)\)/);
    if (file) {
        [,file,line] = file.match(/(.*):(\d+)/);
    }
}