scala - Spark print result of Arrays or saveAsTextFile -


i have been bogged down hours now... tried collect , mkstring(") , still not able print in console or save text file. 

scala> val au1 = sc.parallelize(list(("a",array(1,2)),("b",array(1,2)))) scala> val au2 = sc.parallelize(list(("a",array(3)),("b",array(2)))) scala> val au3 = au1.union(au2)

result of union 

array[(string,array[int])] = array((a,array(1,2)),(b,array(1,2)),(a,array(3)),(b,array(2)))

all print attempts resulting in following when x(0) , x(1) 

 array[int]) not take parameters

last attempt, performed following , resulting in index error

scala> val au4 = au3.map(x => (x._1, x._2._1._1, x._2._1._2)) <console>:33: error: value _1 not member of array[int]          val au4 = au3.map(x => (x._1, x._2._1._1, x._2._1._2))

._1 or ._2 can done in tuples , not in arrays

("a",array(1,2)) tuple ._1 a , ._2 array(1,2)

so if want elements of array need use () x._2(0)

but au2 arrays has 1 element x._2(1) work au1 , not au2. can use option or try below

val au4 = au3.map(x => (x._1, x._2(0), try(x._2(1)) getorelse(0)))

Comments

Post a Comment

Popular posts from this blog

android - InAppBilling registering BroadcastReceiver in AndroidManifest -

i'm implementing inapp billing in android app. works well, however, i'm trying decouple broadcast receiver activity manifest. suggestion in android's trivialdrive sample: // important: dynamically register broadcast messages updated purchases. // register receiver here instead of <receiver> in manifest // because call getpurchases() @ startup, therefore can ignore // broadcasts sent while app isn't running. // note: registering listener in activity bad idea, done here // because sample. regardless, receiver must registered after // iabhelper setup, before first call getpurchases(). currently there's class extends broadcastreceiver : public class iabbroadcastreceiver extends broadcastreceiver { /** * intent action receiver should filter for. */ public static final string action = "com.android.vending.billing.purchases_updated"; private final iabbroadcastlistener mlistener; public iabbroadcastreceiver(iabbroadcastlistener listener) { m...
Read more

python Tkinter Capturing keyboard events save as one single string -

is possible store keyboard events 1 string? code below stores 1 char , prints it. card reader or bar code reader, contains collection of character/ string not 1 character @ time. goal save char pressed text variable. from tkinter import * root = tk() def key(event): text= event.char text+= event.char print ("pressed", text) def callback(event): frame.focus_set() print ("clicked at", event.x, event.y) frame = frame(root, width=100, height=100) frame.bind("<key>", key) frame.bind("<button-1>", callback) frame.pack() root.mainloop() currently, creating text variable , everytime key() function gets called, , text stores last character typed. you can define text module level variable , , use module level text inside key function - text = '' def key(event): global text text+= event.char print("pressed", text)
Read more

sql server - Why does Linq-to-SQL add unnecessary COUNT()? -

here tables: create table customer ( cid int primary key, name varchar(32) ) create table ord ( oid int primary key, cid int foreign key references customer, address varchar(20) ) here's linq-to-sql statement: var aaa = c in db.customer select new { c, o = c.ord.tolist() }; and here's inexplicable query generated linq-to-sql: select [t0].[cid] [cid], [t0].[name] [name], [t1].[oid] [oid], [t1].[cid] [cid2], [t1].[address] [address], (select count(*) [dbo].[ord] [t2] [t2].[cid] = [t0].[cid]) [value] [dbo].[customer] [t0] left outer join [dbo].[ord] [t1] on [t1].[cid] = [t0].[cid] order [t0].[cid], [t1].[oid] i want understand how rid of count(*) part. it's entirely uncalled for! linq needs count(*) in order determine number of entries returned o = c.ord.tolist() .
Read more