Why I hate coffeescript

problem.coffee

featureMap = this.model.get('provider_feature_map')
$('.feature-row').each(->
  featureCode = $(this).data('code')
  $('input', this).each(->
    bookingMapCode = $(this).data('code')
    featureMap[featureCode][bookingMapCode] = $(this).is(':checked') # this loop will only run until this call returns false because of the implicit return and "eventedness" of javascript
  )
)

solution.coffee

featureMap = this.model.get('provider_feature_map')
$('.feature-row').each(->
  featureCode = $(this).data('code')
  $('input', this).each(->
    bookingMapCode = $(this).data('code')
    featureMap[featureCode][bookingMapCode] = $(this).is(':checked')
    true
  )
)

This is an interesting argument. jashkenas/coffeescript#2477 (comment)

And Coco might be considered for new dev work as well: https://github.com/satyr/coco#coco