Hubot Hear Variable - coffeescript

Question

I was hoping to find away to get hubot to here a variable.
Ex
name = "Peter"
module.exports = (robot) ->
robot.hear /hello name/i, (msg) ->
msg.send "Peter?! No I am Hubot."
I have already tried "#{}" syntax like below, but got nowhere with it.
name = "Peter"
module.exports = (robot) ->
robot.hear /hello #{name}/i, (msg) ->
msg.send "Peter?! No I am Hubot."
Any help would be greatly appreciated.
Regards,
Austin

Answer 1

Since your regex is not a constant, you should use new Regex():
Using the constructor function provides runtime compilation of the regular expression. Use the constructor function when you know the regular expression pattern will be changing, or you don't know the pattern and are getting it from another source, such as user input.
Code
name = "Peter"
regx = new Regex("hello #{ name }", 'i')
module.exports = (robot) ->
robot.hear regx, (msg) ->
msg.send "Peter?! No I am Hubot."
Edit
With name as a parameter
module.exports = (robot, name) ->
regx = new Regex("hello #{ name }", 'i')
robot.hear regx, (msg) ->
msg.send "#{ name }?! No I am Hubot."

Answer 2

In case its useful, a hubot example using javascript rather than coffeescript that also takes the option chosen and places it in another variable:
const options = 'now|later|never';
const regexOptions = new RegExp(`starting (${options})`, 'i');
robot.respond(regexOptions, (msg) => {
// this will respond to:
// hubot starting now
// but not to:
// hubot starting notAnOption
const optionChosen = msg.match[1];
msg.send(`option chosen: ${optionChosen}`);
});
I use this technique when I have dynamic lists that I can add or remove names into, that I then want to use within responses - it does require a quick reload of hubot when adding a name to a list used in a command of course.