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Unable to run scala code on page 75 (e-book)

2 replies on 1 page. Most recent reply: Feb 9, 2015 9:51 AM by Akarsh V

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Akarsh V

Posts: 3
Nickname: mqindia123
Registered: Feb, 2015

Unable to run scala code on page 75 (e-book)

Posted: Feb 9, 2015 9:34 AM

When Im trying to run thr arg command program of page 75, it is showing that arg not defined. Because of this I'm not able to proceed first chapter. I"m a beginner please help me.
Code:
println ("Hello"+args (0)+"!")

George B

Posts: 24
Nickname: hmgeorge
Registered: Feb, 2008

Re: Unable to run scala code on page 75 (e-book)

Posted: Feb 9, 2015 9:42 AM

It works fine for me. What command are you using to try and run it? You need to be sure to include a command line argument (example in the book uses "planet") - if you leave it off the program blows up.

Akarsh V

Posts: 3
Nickname: mqindia123
Registered: Feb, 2015

Re: Unable to run scala code on page 75 (e-book)

Posted: Feb 9, 2015 9:51 AM

Thanks for your quick reply. See I first created a new file named hello.scala then typrd the first println statement that is ("Hello, world, from a script!).My interpreter showed the output.
Now I see $ scala hello.scala... (whats this?)

Can yu be specific how I should run command line arguments in scala script.

Btw, when I type println ("Hello" + args (0) + "!") and type for run its showing arg not defined. What is $ scala helloarg.scala planet? Is it command line, If yes how do I work on them? Where should I type them? I'm running scala on eclipse luna on mac.

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