learning how to use destructuring assignment for function parameters and how to express flow control elegantly

tweetlocation.coffee

# not sure if it works yet...
tweetLocation2 = ({place: {name: placename}, coordinates: {coordinates: coords}, user: {location: loc}}) ->
  geocode = (coordinates) ->
    (coordinates? console.log "replace this function w/ a call to twitter reverse geocode api - #{coordinates}") ? false

  placename ? (geocode coords) ? loc ? "somewhere"

  
# works
# remember tweet coords are long, lat 
# https://dev.twitter.com/overview/api/tweets#obj-coordinates
# https://dev.twitter.com/rest/reference/get/geo/reverse_geocode
tweetLocation = ({place: {name: placename}, coordinates: {coordinates: coords}, user: {location: loc}}) ->
  geocode = (coordinates) ->
    if coordinates?
      console.log "calling twitter reverse geocode api on #{coordinates}"
      coordinates # insert call to twitter revgeo api
    else
      false

  if placename? 
    placename
  else if coords?
    geocode coords
  else if loc?
    loc
  else
    "somewhere"


### tweet JSON 

{ created_at: 'Thu Mar 19 07:46:43 +0000 2015',
  id: 578462588721233900,
  id_str: '578462588721233920',
  text: '“Ministerial changes affect policy consistency at Sports Ministry”- Dr. Aggrey Darko : \nPolitical Science lect... http://t.co/FcbTNlve1Z',
  source: '<a href="http://twitterfeed.com" rel="nofollow">twitterfeed</a>',
  truncated: false,
  in_reply_to_status_id: null,
  in_reply_to_status_id_str: null,
  in_reply_to_user_id: null,
  in_reply_to_user_id_str: null,
  in_reply_to_screen_name: null,
  user: 
   { id: 1129756027,
     id_str: '1129756027',
     name: 'Gh Jokes&News L.O.L',
     screen_name: 'GhJokes_News',
     location: 'ACCRA GHANA',
     url: null,
     description: '||GH|| GET Funny Jokes & NEW\'s Updates on ::||Celebrities Lifestyle||Latest Music||Upcoming Events||World News||Upcoming Artiste||Videos||   Hash Tag us #GHeN',
     protected: false,
     verified: false,
     followers_count: 366,
     friends_count: 9,
     listed_count: 24,
     favourites_count: 0,
     statuses_count: 86507,
     created_at: 'Tue Jan 29 01:46:25 +0000 2013',
     utc_offset: null,
     time_zone: null,
     geo_enabled: true,
     lang: 'en',
     contributors_enabled: false,
     is_translator: false,
     profile_background_color: 'C0DEED',
     profile_background_image_url: 'http://abs.twimg.com/images/themes/theme1/bg.png',
     profile_background_image_url_https: 'https://abs.twimg.com/images/themes/theme1/bg.png',
     profile_background_tile: false,
     profile_link_color: '0084B4',
     profile_sidebar_border_color: 'C0DEED',
     profile_sidebar_fill_color: 'DDEEF6',
     profile_text_color: '333333',
     profile_use_background_image: true,
     profile_image_url: 'http://pbs.twimg.com/profile_images/3177336412/763cb6d61bbcef1d95a5d0029cef90b6_normal.jpeg',
     profile_image_url_https: 'https://pbs.twimg.com/profile_images/3177336412/763cb6d61bbcef1d95a5d0029cef90b6_normal.jpeg',
     profile_banner_url: 'https://pbs.twimg.com/profile_banners/1129756027/1390097298',
     default_profile: true,
     default_profile_image: false,
     following: null,
     follow_request_sent: null,
     notifications: null },
  geo: null,
  coordinates: null,
  place: null,
  contributors: null,
  retweet_count: 0,
  favorite_count: 0,
  entities: 
   { hashtags: [],
     trends: [],
     urls: [ [Object] ],
     user_mentions: [],
     symbols: [] },
  favorited: false,
  retweeted: false,
  possibly_sensitive: false,
  filter_level: 'low',
  lang: 'en',
  timestamp_ms: '1426751203123' }
  ###