How would I yield an immutable.Map in Scala?

Posted by Jasper on Stack Overflow See other posts from Stack Overflow or by Jasper
Published on 2010-05-04T07:36:24Z Indexed on 2010/05/04 7:38 UTC
Read the original article Hit count: 221

Filed under:

scala

|

immutable

|

map

|

yield

|

for-loop

I have tried this but it does not work:

val map:Map[String,String] = for { tuple2 <- someList } yield tuple2._1 -> tuple2._2

How else would I convert a List of Tuple2s into a Map?

© 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 immutable

Mutable class as a child of an immutable class

as seen on Stack Overflow - Search for 'Stack Overflow'
I want to have immutable Java objects like this (strongly simplyfied): class Immutable { protected String name; public Immutable(String name) { this.name = name; } public String getName() { return name; } } In some cases the object should not only be readable… >>> More
Why are copy constructors unnecessary for immutable objects?

as seen on Stack Overflow - Search for 'Stack Overflow'
Why are copy constructors unnecessary for immutable objects? Please explain this for me. >>> More
Should this immutable struct be a mutable class?

as seen on Stack Overflow - Search for 'Stack Overflow'
I showed this struct to a fellow programmer and they felt that it should be a mutable class. They felt it is inconvenient not to have null references and the ability to alter the object as required. I would really like to know if there are any other reasons to make this a mutable class. [Serializable] public… >>> More
why copyconstructor unnecessary for immutable objects?

as seen on Stack Overflow - Search for 'Stack Overflow'
why copyconstructor unnecessary for immutable objects?.Please clarify me. >>> More
What's the best name for a non-mutating "add" method on an immutable collection?

as seen on Stack Overflow - Search for 'Stack Overflow'
Sorry for the waffly title - if I could come up with a concise title, I wouldn't have to ask the question. Suppose I have an immutable list type. It has an operation Foo(x) which returns a new immutable list with the specified argument as an extra element at the end. So to build up a list of strings… >>> More