Beginner question pt.2

[Calvin]

When I type this into the terminal it works... but I am wondering if I
am going about things the right way:

$ /opt/local/bin/ruby1.9 -v

$ cd

$ cd Desktop

$ cd programs

$ ruby1.9 calc.rb

then the math equation answer from calc.rb shows up in the terminal.
Am I correct in thinking that ruby 1.9.1 is the ruby that is working
and not ruby 1.8.6?

Thank you for your time,

Calvin Stephens

 

[Robert Klemme]

When I type this into the terminal it works... but I am wondering if I
am going about things the right way:

$ /opt/local/bin/ruby1.9 -v

$ cd

$ cd Desktop

$ cd programs

$ ruby1.9 calc.rb

then the math equation answer from calc.rb shows up in the terminal.
Am I correct in thinking that ruby 1.9.1 is the ruby that is working
and not ruby 1.8.6?

It's likely but program names can be changed arbitrarily. If you want
to be sure you can easily find out by entering

ruby1.9 -v

Kind regards

robert

 

[Calvin]

It's likely but program names can be changed arbitrarily.  If you want
to be sure you can easily find out by entering

ruby1.9 -v

Kind regards

        robert

Thanks Robert!

When I type in Ruby1.9 -v i get: ruby 1.9.1p129 with some other text.

 

[Calvin]

Thanks Robert!

When I type in Ruby1.9 -v   i get: ruby 1.9.1p129 with some other text.- Hide quoted text -

- Show quoted text -

I am also wondering if I could just type this into my terminal to get
ruby1.9 to run a ruby file:

$ cd


$ cd Desktop


$ cd programs


$ ruby1.9 calc.rb

Is this correct or incorrect?

Thanks for your time,

Calvin

 

[Martin DeMello]

I am also wondering if I could just type this into my terminal to get
ruby1.9 to run a ruby file:

$ cd
$ cd Desktop
$ cd programs
$ ruby1.9 calc.rb

Is this correct or incorrect?

Yes, that's correct, as long as ruby1.9 is in your path.

Also you can say cd ~/Desktop/programs rather than three separate cds.
And don't miss tab completion, if you're using bash.

martin

 

[Calvin]

Yes, that's correct, as long as ruby1.9 is in your path.

Also you can say cd ~/Desktop/programs rather than three separate cds.
And don't miss tab completion, if you're using bash.

martin

Hi Martin,

I am using bash... what is "tab completion" and how do I do it?

 

[Mk 27]

Hi Martin,

I am using bash... what is "tab completion" and how do I do it?

Start typing enough of the directory name, and by pressing tab bash will
finish it for you -- if what you have is enough to identify it uniquely.

For example, if you are in /home/me and you want to get to
scripts/ruby/tests, try "cd scr" don't press return, press tab and scr
will expand to scripts, then "/ru" and do the same thing, then "/te" tab
and you'll have
cd scripts/ruby/tests
now you can hit return, and all you actually typed was cd
scr[TAB]/ru[TAB]/te[TAB]

Hopefully that is clear enough...a lot of CLI (and GUI) apps use tab
completion (eg, google).

 

[Calvin]

Hi Martin,

I am using bash... what is "tab completion" and how do I do it?

Start typing enough of the directory name, and by pressing tab bash will
finish it for you -- if what you have is enough to identify it uniquely.

For example, if you are in /home/me and you want to get to
scripts/ruby/tests, try "cd scr" don't press return, press tab and scr
will expand to scripts, then "/ru" and do the same thing, then "/te" tab
and you'll have
cd scripts/ruby/tests
now you can hit return, and all you actually typed was cd
scr[TAB]/ru[TAB]/te[TAB]

Hopefully that is clear enough...a lot of CLI (and GUI) apps use tab
completion (eg, google).

That's pretty useful information! Thanks a bunch for your time!