Error: value is not a member of object using Scala on the shell

Question

Hello I have this scala object and I want to run the code in sample function using the shell with scala:

object SampleObject{ 
    def sample(){

         val data = Array(1, 2, 3, 4, 5)
         data.foreach(println(_))
    }
}

What I do is this

scala> :load /Users/username/Desktop/Cli.scala 
Loading /Users/username/Desktop/Cli.scala...
defined object SampleObject

But if I run this

scala> SampleObject.sample

This is what I ge this

<console>:92: error: value sample is not a member of object SampleObject
   SampleObject.sample

Why does this happen? There's a problem with the commands :load and -i, it's like you can't access to the objects members. Any suggestion to make it work?

UPDATE1: If I run the code above neither doing load or -i but by writing it directly on the shell everything works properly.

UPDATE2: Still not working...

Am I right assuming you compile your Scala file before loading it in Spark? By the way, what version of Spark and Scala are you using? — Adonis
– Adonis, Commented Mar 31, 2017 at 13:25
@asettouf it says "Scala code runner version 2.11.7". Anyway I didn't compile it, I've loaded it and it rightly says "defined object SampleObject" so why can't I access to it's members? — Matt
– Matt, Commented Mar 31, 2017 at 16:00
@radumanolescu lucky you, on my terminal this doesn't work. Wether I call ">scala -i /dir/file.scala" or I do ">scala; >:load /dir/file.scala" it says defined object SampleObject but it doesn't allow me to access to its members anyway. — Matt
– Matt, Commented Mar 31, 2017 at 16:04
Actually my bad, no need to compile. I just made the test with Scala 2.11.8 and Spark 2.1.0 and it works fine. (both with -i and :load) Meaning there is something else going wrong here. What Spark version do you use? What jdk version are you using as well? — Adonis
– Adonis, Commented Mar 31, 2017 at 16:54

Joe Pallas · Accepted Answer · 2017-04-08 00:20:49Z

4

The problem is that line break before the brace. You can fix this either of two ways:

Use :paste instead of :load
Put the brace on the same line as the object name

Your original question said object SampleObject{ but it turns out that is not what your actual file contains, as your update 2 shows. Since :load works line-by-line, just as if you were typing at the REPL, when the interpreter sees

object Cli

it's done: that is a perfectly valid, complete Scala declaration of a (not terribly interesting) object. The opening brace on the next line will start a new block that is unrelated to the object you've just defined.

This is an area where the interactive REPL behaves differently from the compiler, which will allow a single newline before the brace (see the Scala language specification for specifics).

answered Apr 8, 2017 at 0:20

Joe Pallas

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1 Comment

Matt Over a year ago

Oh that's true! That was my fault too with the question! Thank you so much.

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