Question

I’m using this coffeescript code:

in a spec file:

index = new MeetingIndex(render: false, collection: booking.meetings)
index.render(writeTo: '.sandbox')

in the view file:

render: (options = {}) ->
  console.log 'options'
  console.log options
  console.log 'options'
  options[key] ||= val for key, val of writeTo: 'body', enhanceUI: true

the browser console prints:

Object
  enhanceUI: true
  writeTo: "body"

What could be happening here?, how can I pass parameters to render method?

Answer 1

You’re just being fooled by an asynchronous console.log. Your first console.log call is just grabbing a reference to options but by the time it tries to log it, you’ve already updated it. Try this instead:

render: (options = {}) ->
  console.log 'options'
  console.log _(options).clone()
  console.log 'options'
  options[key] ||= val for key, val of writeTo: 'body', enhanceUI: true

Demo: http://jsfiddle.net/ambiguous/EZc7N/