Using the CSV NPM Package, turn objects into CSV

objects_to_csv.coffee

# An example project showing how to write objects using the CSV npm package


csv = require 'csv'
util = require 'util'

# Use the callback API to write this
callback_generate_csv_from_list = (records_to_write, cb) ->

  map_reduce_it = []
  for current_profile in profile_list
    map_reduce_it.push( [current_profile.name
        , current_profile.category_name
        , current_profile.brand?.name] )

  csv.stringify(map_reduce_it, {header: true, columns: ["Name", "Category", "Brand"]}, cb)


# Use the streaming API to write this
streaming_generate_csv_from_list = (records_to_write, writable_stream) ->
  stringer = csv.stringify({header: true, columns: ["Name", "Category", "Brand"]})
  stringer.on 'readable', () ->
    while(data = stringer.read())
        writable_stream.write(data)

  for current_profile in profile_list
    #console.log "processing current item: #{current_profile}"
    stringer.write [current_profile.name
        , current_profile.category_name
        , current_profile.brand?.name]

  stringer.end()


profile_list = [ {name: "Macbook Pro, Retina", category_name: "Computer", brand: {name: "Apple"}},
                 {name: "Macbook Pro", category_name: "Computer", brand: {name: "Apple"}},
                 {name: "Acer 1", category_name: "Netbook", brand: {name: "Acer"}} ]


use_callback = true

if use_callback
  callback_generate_csv_from_list profile_list, (err, data) ->
    if err?
      console.write "ERROR!"
    else
      process.stdout.write data
    process.exit()

else
  streaming_generate_csv_from_list profile_list, process.stdout