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 <pradhandeep1...@gmail.com> > 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 >> >> >
