multiple-gear.coffee

ultimateGear: ->
      # on the server this is a LoDash transform, on the client its an object
      owned = if window? then user.items.gear.owned else user.items.gear.owned.toObject()
      content.classes.forEach (klass) ->
        user.achievements.ultimateGear[klass] = _.reduce ['armor', 'shield', 'head', 'weapon'], (soFarGood, type) ->
          found = _.find content.gear.tree[klass][type], {last:true}
          soFarGood and (!found or owned[found.key]==true) #!found only true when weapon is two-handed (mages)
        , true # start with true, else `and` will fail right away

turns out you don't need return true in Array.forEach, just a thing with Lodash's _.each method. Looks like it's emulating the behavior of Array.every instead of Array.forEach, former which indeed exists upon encountering false

content.gear.tree[klass][type] needed to be content.gear.tree[type][klass], but otherwise this seems to work great!