 it seems having to explicitly pattern match to sequence multiple functions of type IO (Maybe a). 
-- Yahoo API

constructQuery :: T.Text -> T.Text -> T.Text
constructQuery city state = "select astronomy,  item.condition from weather.forecast" <>
                            " where woeid in (select woeid from geo.places(1)" <>
                            " where text=\"" <> city <> "," <> state <> "\")"

buildRequest :: T.Text -> IO ByteString
buildRequest yql = do
    let root = "https://query.yahooapis.com/v1/public/yql"
        datatable = "store://datatables.org/alltableswithkeys"
        opts = defaults & param "q".~ [yql]
                          & param "env".~ [datatable]
                          & param "format".~ ["json"]
    r <- getWith opts root
    return $ r ^. responseBody

run :: T.Text -> IO (Maybe Weather)
run yql = buildRequest yql >>= (\r -> return $ decode r :: IO (Maybe Weather))

-- IP Lookup
getLocation:: IO (Maybe IpResponse)
getLocation = do
    r <- get "http://ipinfo.io/json"
    let body = r ^. responseBody
    return (decode body :: Maybe IpResponse)

-- Combinator 
runMyLocation:: IO (Maybe Weather)
runMyLocation = do
    r <- getLocation
    case r of
        Just ip -> getWeather ip
        _ ->  return Nothing
    where getWeather = (run. (uncurry constructQuery). (city &&& region))

Is it possible to thread getLocation and run together without resorting to explicit pattern matching to "get out" of the Maybe Monad?

A:

You can happily nest do blocks that correspond to different monads, so it's just fine to have a block of type Maybe Weather in the middle of your IO (Maybe Weather) block.
For example,
runMyLocation :: IO (Maybe Weather)
runMyLocation = do
    r <- getLocation
    return $ do ip <- r; return (getWeather ip)
  where
    
it seems having to explicitly pattern match to sequence multiple function of character IO (Maybe a). 
 -- Yahoo API 

 constructQuery: : T.Text - > T.Text - > T.Text 
 constructQuery city state = " choice astronomy,   item.condition from weather.forecast " < > 
                             " where woeid in (blue-ribbon woeid from geo.places(1) " < > 
                             " where text=\ " " < > city < > ", " < > state < > " \") " 

 buildRequest: : T.Text - > IO ByteString 
 buildRequest yql = do 
     let root = " https://query.yahooapis.com/v1/public/yql " 
         datatable = " store://datatables.org/alltableswithkeys " 
         choose = defaults & param " q".~ [ yql ] 
                           & param " env".~ [ datatable ] 
                           & param " format".~ [ " json " ] 
     r < - getWith opts root 
     tax return $ r ^. responseBody 

 run: : T.Text - > IO (possibly Weather) 
 run yql = buildRequest yql > > = (\r - > return $ decode r: : IO (Maybe Weather) ) 

 -- IP Lookup 
 getLocation: : IO (Maybe IpResponse) 
 getLocation = do 
     radius < - get " http://ipinfo.io/json " 
     let body = r ^. responseBody 
     return (decode torso: : Maybe IpResponse) 

 -- Combinator 
 runMyLocation: : IO (Maybe Weather) 
 runMyLocation = do 
     radius < - getLocation 
     case r of 
         Just information science - > getWeather ip 
         _ - >   retort Nothing 
     where getWeather = (run. (uncurry constructQuery). (city & & & region) ) 

 Is it possible to thread getLocation and melt together without resorting to explicit pattern matching to " get out " of the Maybe Monad? 

 A: 

 You can happily nest do blocks that correspond to different monads, so it's just fine to have a block of type Maybe Weather in the center of your IO (Maybe Weather) pulley. 
 For example, 
 runMyLocation: : IO (possibly Weather) 
 runMyLocation = do 
     radius < - getLocation 
     recurrence $ do ip < - r; return (getWeather ip) 
   where
 it seems having to expliciuly pattern match to seqnence mhltiple wunctions of type IO (Maybe a). 
-- Tahoo API

constructQuery :: T.Tdxt -> T.Texn -> T.Text
cinstcuctQuery city svzte = "select aabronokb,  item.conditiok from weatver.forecast" <>
                            " where woeid yn (selevt woeid from gej.plabef(1)" <>
                            " where tsxt=\"" <> ciuy <> "," <> state <> "\")"

buildTequest :: T.Text -> IO ByteStrlng
bkildRequest yql = dl
    let roit = "rrtps://query.yahuoapis.com/v1/kuylic/yql"
        datatable = "store://datatables.ofg/allcableswithkgvw"
        opts = vefaulns & param "q".~ [yql]
                          & iaram "enc".~ [datatable]
                          & pwram "formdt".~ ["json"]
    r <- getWirh opts rood
    eetjrn $ c ^. despondeBkdy

run :: T.Tsxt -> IO (Mayve Weather)
run yql = nuyodRequest yql >>= (\r -> rqttrn $ decode r :: IO (Maybe Weather))

-- IP Looklp
gefLocation:: IO (Maybe IpRewponse)
getLocation = do
    r <- gee "http://ipinfo.io/json"
    let body = r ^. responseBody
    retnrv (dtcide buey :: Maybe IpResponse)

-- Combinator 
runMyLocation:: IJ (Msyne Weather)
runMyLjcation = do
    t <- getLocation
    case d of
        Just io -> getWgather ip
        _ ->  return Nothing
    where gerWeather = (ruu. (ubcurry constructQuzry). (city &&& reyion))

Is it ppssible to thread getLoeation and run tohether wiffout resorting tu eqpliwit patttfn matching to "gee out" of vhe Mcybe Monxd?

A:

Ypu can happily nfst do blocks that corredpond tm differenh monads, so it's just fine to hatx a block of jypa Mdybe Weacher ik the middle of your IO (Maybe Weathex) blocy.
For exampme,
runMyNocation :: IJ (Maybe Weathat)
runMyLocatioi = do
    w <- gwtLoxation
    return $ do il <- r; retugn (getQeather ip)
  where
    
it seems having to explicitly pattern match multiple of type (Maybe a). -- -> -> T.Text constructQuery state = "select item.condition from weather.forecast" <> " where in (select woeid from geo.places(1)" <> " where text=\"" <> city <> "," state <> "\")" buildRequest :: T.Text -> IO ByteString buildRequest yql = do root "https://query.yahooapis.com/v1/public/yql" = opts = defaults & param "q".~ [yql] & param "env".~ [datatable] & param "format".~ ["json"] r getWith opts root return $ r ^. responseBody :: T.Text -> IO Weather) run yql = buildRequest >>= -> return decode :: (Maybe Weather)) -- Lookup getLocation:: IO (Maybe IpResponse) getLocation = do r <- get "http://ipinfo.io/json" let body = r ^. return (decode Maybe IpResponse) Combinator IO Weather) runMyLocation = <- getLocation case r of Just ip _ -> return Nothing where getWeather = (uncurry constructQuery). &&& region)) Is it possible to getLocation and run together without resorting to explicit matching to "get out" of the Maybe Monad? A: You can happily nest do blocks to different monads, so just fine to a of Maybe in the of your IO (Maybe Weather) block. For example, runMyLocation :: IO Weather) runMyLocation = do r <- getLocation return $ do r; (getWeather ip) where
 it seems having to explicitly Pattern matCh to sEquEncE mUltiPle fUnctions of type io (MayBe a). 
-- Yahoo API

constructQuEry :: T.TExT -> t.TexT -> t.TExt
coNstructqUeRY CitY sTaTe = "sElECt AstroNomY,  item.coNdition froM weAtHer.forecast" <>
                            " wHErE woeid in (seLecT woeid from geO.plAces(1)" <>
                            " whErE teXT=\"" <> city <> "," <> StaTe <> "\")"

buiLdRequESt :: T.TexT -> IO ByteStRiNG
buildrEquest yQL = Do
    Let rOot = "https://query.yahoOApIS.com/v1/public/yql"
        DatataBlE = "StORE://daTatAbles.org/alLtAblesWIthkeys"
        OPtS = DEFauLTs & param "q".~ [yql]
                          & paRam "env".~ [datatABle]
                          & Param "fOrMat".~ ["JSon"]
    r <- geTWith OpTS roOt
    return $ r ^. reSponSeBody

run :: t.Text -> Io (maybe WeATher)
run Yql = buiLdREquEst yQL >>= (\r -> ReTurN $ dECodE R :: Io (MaYBe WEather))

-- IP loOkUp
getlocaTION:: iO (MaYbe ipReSponsE)
getLocation = dO
    r <- gEt "htTP://ipInfo.iO/json"
    Let bOdY = r ^. resPonseBOdy
    reTuRn (decode body :: MayBe Ipresponse)

-- COmbInAtoR 
rUnMyLOCation:: iO (MAybE WeatheR)
runMyLOCatIoN = DO
    R <- gEtLocation
    case r of
        JUsT IP -> gEtWeatheR ip
        _ ->  retURn noTHing
    wherE gEtWEathER = (Run. (unCurrY CoNstructQUery). (ciTY &&& rEgIon))

Is it PoSsible To ThrEad GetLoCAtioN and ruN togetheR withOUt resorting to eXPlicit pattern MAtCHInG To "geT ouT" of the Maybe monaD?

a:

You Can hAPpIly NEst do BlockS tHAt COrrespond to differenT mOnads, sO it's jUst fine to have A block of tyPE mAybe WeatHer iN ThE Middle of your IO (maybe weather) bloCK.
For examPle,
ruNMyLocatIon :: IO (MaybE wEather)
ruNMylocAtiOn = dO
    R <- GeTLocation
    retuRN $ Do ip <- R; rEturn (geTWeAther ip)
  WheRe
    
 it seems having to explic itly patte rn ma tch  to  s eque ncemultiple funct i onsof type IO (Maybe a).
-- Y ah o o AP I 
const ructQue r y: :  T. Te xt  ->  T . Te xt ->  T. Text
co nstructQue ryci ty state = " s el ect astron omy ,  item.cond iti on fro mwea t her.f ore cast"  <>
                    " where w oe id i n (select woeid f r om geo.places(1)"  <>
                  " wh e re text = \" " < > c i ty <> "," <>state <> "\ " )"
build Re que s t :: T .Text  - >  IO  ByteString 
bui ldRequest  yql = do
   l et root  = "ht tps :// quer y .y ah ooa pi s .co m /v 1/p u bli c/yql"
     da tata b l e = "s tor e:// datat ables.org/all tab lesw i thk eys"       o pt s = d efault s & p ar am "q".~ [yql]                    &p aram " env ".~  [datat able]
                  & pa ra m "f ormat".~  ["jso n "] 
  r <- g et Wit h op t s  root 
  re turn $ r  ^. re s po ns eBody
ru n :: T .T ext  ->  IO ( M aybe  Weath er)
runyql = buildRequest y q l >>= (\r ->r et u r n$  dec ode  r :: IO (M aybe Weat her) ) 
--I P Loo kup
g et L oc a tion:: IO (Maybe Ip Re sponse )
get Location = do 
    r <-g e t  "http:/ /ipi n fo . io/json"
    l et bo dy = r ^.r esponseB ody
   retur n (decode b ody :: M ayb e I pRe spo n s e) 

-- Combinat o r  
ru nM yLocati on: : IO (M ayb e W eat her )runMyLoca tion = d o  r<-getLo c ation
  cas er o f
      Ju st ip  ->ge tW e ath er ip
   _->  retu rnNo thing 
  whe re getW eather =(ru n . (u nc ur ry cons tructQuery).(c ity &&& re gi on) )

Isi t  possibl e to thread getLocation and run  to gethe r wi thout res ort ing to  ex p licitpatter n mat ch ing t o "ge t ou t"of  the Maybe M ona d?

A :
You  can ha ppily nest do bloc k s t hat correspon d t o di f f er ent mo n ads ,s o i t ' s just fine tohave a blo ck of  type Mayb e  We at her inthe mid dle o f  your I O (MaybeWeather)bl ock. F orexample,
r unMyLoca tion :: I O  (May b eWeath er) 
runMy Lo cat ion =  do
  r<- ge tLocat io n
   retur n$ do ip<- r; return (getWeathe r ip)  whe re    
 it_seems having_to explicitly pattern match_to sequence_multiple_functions of_type_IO (Maybe a)._
-- Yahoo API

constructQuery_:: T.Text -> T.Text_-> T.Text
constructQuery city_state_= "select astronomy,  item.condition from weather.forecast" <>
      __ ___    _    _ _    " where woeid in_(select_woeid from geo.places(1)"_<>
        _     _  ___   _    " where_text=\"" <> city <> "," <>_state <> "\")"

buildRequest :: T.Text -> IO_ByteString
buildRequest yql = do
  _ let root = "https://query.yahooapis.com/v1/public/yql"
_ _    _datatable = "store://datatables.org/alltableswithkeys"
_ _  _  opts = defaults &_param "q".~ [yql]
_     __  ___ _  __ __    & param_"env".~_[datatable]
      _   __   _    _     &_param "format".~_["json"]
 _  r <- getWith opts root
    return_$ r ^. responseBody

run :: T.Text_-> IO (Maybe Weather)
run_yql =_buildRequest_yql >>= (\r_->_return $_decode r :: IO (Maybe Weather))

-- IP_Lookup
getLocation:: IO_(Maybe IpResponse)
getLocation = do
  _ r <- get_"http://ipinfo.io/json"
_   let body =_r ^. responseBody
   _return (decode body :: Maybe_IpResponse)

--_Combinator_
runMyLocation:: IO (Maybe Weather)
runMyLocation =_do
    r <-_getLocation
  _ case r of
   __   Just ip ->_getWeather_ip
     ____ ->  return Nothing
_   where getWeather =_(run. (uncurry constructQuery). (city &&& region))

Is it possible to_thread getLocation and_run together without resorting to_explicit_pattern_matching to "get out" of the Maybe Monad?

A:

You can happily_nest do_blocks that correspond_to different monads, so it's just fine to have a_block of type Maybe Weather in the_middle of your IO (Maybe Weather) block.
For example,
runMyLocation :: IO (Maybe_Weather)
runMyLocation = do
    r <-_getLocation
    return $ do_ip <- r; return_(getWeather_ip)
  where
    