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From: Sask Khan on 29 Mar 2010 16:27
All,

Just started Ruby and using Notepad++ for writing code but for some
reason, upon execution of the *.rb file, the command prompt give me the
attached error (please see the image attached).

The file is just a text file called 'text.txt', which is sitting in the
same folder as the ruby script file. Im confused...

Secondly, why is the answer '555' to the registration question... I
think Im confused by the '11', which I thougth either should be read an
a string or a normal number. Can anyone shed some light on this
please...

Cheers,

Attachments:
http://www.ruby-forum.com/attachment/4629/RudyError.jpg

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From: Roger Pack on 29 Mar 2010 16:42
Sask Khan wrote:
> All,
>
> Just started Ruby and using Notepad++ for writing code but for some
> reason, upon execution of the *.rb file, the command prompt give me the
> attached error (please see the image attached).
>
> The file is just a text file called 'text.txt', which is sitting in the
> same folder as the ruby script file. Im confused...

You'll need to run "ruby" from the same directory where 'text.txt' is
located.
-rp
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From: Sask Khan on 29 Mar 2010 16:48
Roger Pack wrote:
> You'll need to run "ruby" from the same directory where 'text.txt' is
> located.
> -rp

Roger, what do you mean? Ruby.exe is sitting in C:\Program
Files\Ruby\Bin\ruby.exe, am I to copy the script and the txt file to
that folder in order to run this?
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From: Daniel Frank on 29 Mar 2010 17:50
Sask Khan wrote:
> Roger Pack wrote:
>> You'll need to run "ruby" from the same directory where 'text.txt' is
>> located.
>> -rp
>
> Roger, what do you mean? Ruby.exe is sitting in C:\Program
> Files\Ruby\Bin\ruby.exe, am I to copy the script and the txt file to
> that folder in order to run this?

No.
Add the following line on the top of your script:
Dir.pwd
This will show you in which working directory ruby was started from.
Guessing from the screenshot I assume it will be C:\Program
Files\Notepad++.
Since you did not specify the path of test.txt, ruby will try to open a
file test.txt in that directory.
There are a couple of ways around:
a) Change the working directory before you start ruby. For example open
a command prompt, enter "cd /d g:\docs\l_ruby", then run the script:
"ruby analyzer.rb"
b) Change the working directory after you start ruby. Add a line before
your "File.read...." line:
Dir.chdir("g:/docs/l_ruby")
That will change the working directory to the one that contains the
test.txt file.
c) Figure out how to change the working directory that Notepad++ starts
ruby in. I have no idea how to do this.
I hope this will get you back on the track again. I suggest you have a
look at http://en.wikipedia.org/wiki/Working_directory to learn what a
working directory is, if you don't know already. It's essential to know
when writing scripts.
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From: Sask Khan on 30 Mar 2010 01:29
Daniel,

Thanks much for the help & guidance. Thats a wonderful start and atleast
now I know where to look.

best,


Daniel Frank wrote:
> No.
> Add the following line on the top of your script:
> Dir.pwd
> This will show you in which working directory ruby was started from.
> Guessing from the screenshot I assume it will be C:\Program
> Files\Notepad++.
> Since you did not specify the path of test.txt, ruby will try to open a
> file test.txt in that directory.
> There are a couple of ways around:
> a) Change the working directory before you start ruby. For example open
> a command prompt, enter "cd /d g:\docs\l_ruby", then run the script:
> "ruby analyzer.rb"
> b) Change the working directory after you start ruby. Add a line before
> your "File.read...." line:
> Dir.chdir("g:/docs/l_ruby")
> That will change the working directory to the one that contains the
> test.txt file.
> c) Figure out how to change the working directory that Notepad++ starts
> ruby in. I have no idea how to do this.
> I hope this will get you back on the track again. I suggest you have a
> look at http://en.wikipedia.org/wiki/Working_directory to learn what a
> working directory is, if you don't know already. It's essential to know
> when writing scripts.

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