In Scala, is there a way to get the currently evaluated items in a Stream?

Posted by abhin4v on Stack Overflow See other posts from Stack Overflow or by abhin4v
Published on 2010-05-14T05:20:02Z Indexed on 2010/05/14 5:24 UTC
Read the original article Hit count: 201

Filed under:

scala

|

stream

|

lazy-evaluation

In Scala, is there a way to get the currently evaluated items in a Stream? For example in the Stream

val s: Stream[Int] = Stream.cons(1, Stream.cons(2, Stream.cons(3, s.map(_+1))))

the method should return only List(1,2,3).

© Stack Overflow or respective owner

Related posts about scala

ensime scala errors (class scala.Array not found, object scala not found)

as seen on Stack Overflow - Search for 'Stack Overflow'
I've installed ensime according to the README.md file, however, I get errors in the inferior-ensime-server buffer with the following: INFO: Fatal Error: scala.tools.nsc.MissingRequirementError: object scala not found. scala.tools.nsc.MissingRequirementError: object scala not found. at scala… >>> More
infinite loop shutting down ensime

as seen on Stack Overflow - Search for 'Stack Overflow'
When I run M-X ensime-disconnect I get the following forever: string matching regex `\"((?:[^\"\\]|\\.)*)\"' expected but `^@' found and I see this exception when I use C-c C-c Uncaught exception in com.ensime.server.SocketHandler@769aba32 java.net.SocketException: Broken pipe at java… >>> More
How to resolve java.nio.charset.UnmappableCharacterException in Scala 2.8.0?

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm using Scala 2.8.0 and trying to read pipe delimited file like in code snipped below: object Main { def main(args: Array[String]) :Unit = { if (args.length > 0) { val lines = scala.io.Source.fromPath("QUICK!LRU-2009-11-15.psv") for (line <-lines) print(line) } … >>> More
Question on Scala Closure (From "Programming in Scala")

as seen on Stack Overflow - Search for 'Stack Overflow'
I don't understand why authors said that Code Listing 9.1 from "Programming in Scala" use closure. In chapter 9, they show how to refactor code into more less duplicated form, from this original code: object FileMatcher { private def filesHere = (new java.io.File(".")).listFiles def filesEnding(query:… >>> More
Common idiom in Java to Scala, traverse/Iterate Java list into Scala list

as seen on Stack Overflow - Search for 'Stack Overflow'
I am processing a XML document and iterating through nodes. I want to iterate through the nodes and build a new List of some type. How would I do this with Scala: Here is my XML traverse code: def findClassRef(xmlNode: Elem) = { xmlNode\"classDef" foreach { (entry) => val name… >>> More

Related posts about stream

Transcode MP3 stream (shoutcast/icecast) into HE-AAC stream (for shoutcast/icecast) under linux

as seen on Super User - Search for 'Super User'
How can I transcode MP3 stream (shoutcast/icecast) into HE-AAC stream (for shoutcast/icecast) under linux. Note: I've tried with StreamTranscoderV3 unsuccessfully because it's highly broken when it comes to transcoding to AAC+ >>> More
Can't play stream from TorrentFlux stream

as seen on Super User - Search for 'Super User'
Hi I am trying to stream a video from my TorrentFlux-b4rt server. I tried multiple media players, none work. Only VLC was able to produce an error message: input can't be opened: VLC is unable to open the MRL 'mms://...:8080/'. Check the log for details. I have tried multiple computers on… >>> More
Shoucast/ICECast stream conversion from MP3 to HE-AAC Stream

as seen on Super User - Search for 'Super User'
I have a stream that's being received in MP3 and I'd like to convert it to another stream that will feed another instance of Shoutcast/ICEcast in audio/aacp format. Does anybody knows how to do this? >>> More
How to find other end of unix socket connection?

as seen on Server Fault - Search for 'Server Fault'
I have a process (dbus-daemon) which has many open connection over UNIX sockets. One of these connections is fd #36: =$ ps uw -p 23284 USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND depesz 23284 0.0 0.0 24680 1772 ? Ss 15:25 0:00 /bin/dbus-daemon --fork… >>> More
Capturing and Transforming ASP.NET Output with Response.Filter

as seen on West-Wind - Search for 'West-Wind'
During one of my Handlers and Modules session at DevConnections this week one of the attendees asked a question that I didn’t have an immediate answer for. Basically he wanted to capture response output completely and then apply some filtering to the output – effectively injecting some additional… >>> More