Re: Number of elements in ArrayBuffer
You really should show your Spark code then. I think you are mistaking one of the Spark APIs, and are processing a collection of 1 ArrayBuffer at some point, not an ArrayBuffer. On Wed, Sep 3, 2014 at 6:42 AM, Deep Pradhan wrote: > I have a problem here. > When I run the commands that Rajesh has suggested in Scala REPL, they work > fine. But, I want to work in a Spark code, where I need to find the number > of elements in an ArrayBuffer. In Spark code, these things are not working. > How should I do that? > > > On Wed, Sep 3, 2014 at 10:25 AM, Madabhattula Rajesh Kumar > wrote: >> >> Hi Deep, >> >> Please find below results of ArrayBuffer in scala REPL >> >> scala> import scala.collection.mutable.ArrayBuffer >> import scala.collection.mutable.ArrayBuffer >> >> scala> val a = ArrayBuffer(5,3,1,4) >> a: scala.collection.mutable.ArrayBuffer[Int] = ArrayBuffer(5, 3, 1, 4) >> >> scala> a.head >> res2: Int = 5 >> >> scala> a.tail >> res3: scala.collection.mutable.ArrayBuffer[Int] = ArrayBuffer(3, 1, 4) >> >> scala> a.length >> res4: Int = 4 >> >> Regards, >> Rajesh >> >> >> On Wed, Sep 3, 2014 at 10:13 AM, Deep Pradhan >> wrote: >>> >>> Hi, >>> I have the following ArrayBuffer: >>> >>> ArrayBuffer(5,3,1,4) >>> >>> Now, I want to get the number of elements in this ArrayBuffer and also >>> the first element of the ArrayBuffer. I used .length and .size but they are >>> returning 1 instead of 4. >>> I also used .head and .last for getting the first and the last element >>> but they also return the entire ArrayBuffer (ArrayBuffer(5,3,1,4)) >>> What I understand from this is that, the entire ArrayBuffer is stored as >>> one element. >>> >>> How should I go about doing the required things? >>> >>> Thank You >>> >> > - To unsubscribe, e-mail: user-unsubscr...@spark.apache.org For additional commands, e-mail: user-h...@spark.apache.org
Re: Number of elements in ArrayBuffer
I have a problem here. When I run the commands that Rajesh has suggested in Scala REPL, they work fine. But, I want to work in a Spark code, where I need to find the number of elements in an ArrayBuffer. In Spark code, these things are not working. How should I do that? On Wed, Sep 3, 2014 at 10:25 AM, Madabhattula Rajesh Kumar < mrajaf...@gmail.com> wrote: > Hi Deep, > > Please find below results of ArrayBuffer in scala REPL > > scala> import scala.collection.mutable.ArrayBuffer > import scala.collection.mutable.ArrayBuffer > > scala> val a = ArrayBuffer(5,3,1,4) > a: scala.collection.mutable.ArrayBuffer[Int] = ArrayBuffer(5, 3, 1, 4) > > scala> a.head > res2: Int = 5 > > scala> a.tail > res3: scala.collection.mutable.ArrayBuffer[Int] = ArrayBuffer(3, 1, 4) > > scala> a.length > res4: Int = 4 > > Regards, > Rajesh > > > On Wed, Sep 3, 2014 at 10:13 AM, Deep Pradhan > wrote: > >> Hi, >> I have the following ArrayBuffer: >> >> *ArrayBuffer(5,3,1,4)* >> >> Now, I want to get the number of elements in this ArrayBuffer and also >> the first element of the ArrayBuffer. I used .length and .size but they are >> returning 1 instead of 4. >> I also used .head and .last for getting the first and the last element >> but they also return the entire ArrayBuffer (ArrayBuffer(5,3,1,4)) >> What I understand from this is that, the entire ArrayBuffer is stored as >> one element. >> >> How should I go about doing the required things? >> >> Thank You >> >> >
Re: Number of elements in ArrayBuffer
Hi Deep, Please find below results of ArrayBuffer in scala REPL scala> import scala.collection.mutable.ArrayBuffer import scala.collection.mutable.ArrayBuffer scala> val a = ArrayBuffer(5,3,1,4) a: scala.collection.mutable.ArrayBuffer[Int] = ArrayBuffer(5, 3, 1, 4) scala> a.head res2: Int = 5 scala> a.tail res3: scala.collection.mutable.ArrayBuffer[Int] = ArrayBuffer(3, 1, 4) scala> a.length res4: Int = 4 Regards, Rajesh On Wed, Sep 3, 2014 at 10:13 AM, Deep Pradhan wrote: > Hi, > I have the following ArrayBuffer: > > *ArrayBuffer(5,3,1,4)* > > Now, I want to get the number of elements in this ArrayBuffer and also the > first element of the ArrayBuffer. I used .length and .size but they are > returning 1 instead of 4. > I also used .head and .last for getting the first and the last element but > they also return the entire ArrayBuffer (ArrayBuffer(5,3,1,4)) > What I understand from this is that, the entire ArrayBuffer is stored as > one element. > > How should I go about doing the required things? > > Thank You > >
Number of elements in ArrayBuffer
Hi, I have the following ArrayBuffer: *ArrayBuffer(5,3,1,4)* Now, I want to get the number of elements in this ArrayBuffer and also the first element of the ArrayBuffer. I used .length and .size but they are returning 1 instead of 4. I also used .head and .last for getting the first and the last element but they also return the entire ArrayBuffer (ArrayBuffer(5,3,1,4)) What I understand from this is that, the entire ArrayBuffer is stored as one element. How should I go about doing the required things? Thank You
