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In this video, we'll show you how to run your first Ruby program right in your browser, using Treehouse Workspaces.
Here's the code for our first program. It's just one line:
puts "Hello, Ruby!"
Here's how to run it:
- Launching the Treehouse Workspace on this video's page.
- Click in the Console area at the bottom. You'll know it's been activated if a blinking cursor appears down there.
- Type
ruby, a space, and the name of our program file,hello.rb. Then hit Enter. - Ruby will run our program, and print out the message from our code.
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[MUSIC]
0:00
Hi, I'm Jay McGavren, a web developer and
teacher at Treehouse, and
0:04
I'm here to introduce you to
the Ruby programming language.
0:08
Ruby is so easy to use,
we're going to run our first program now.
0:12
I'm not kidding, let's do it right now.
0:16
If you're watching this
video on the Treehouse site,
0:19
there should be a Launch Workspace
button on the page.
0:22
Click that now.
0:24
You'll see a dialog where you can
change the name of your new Workspace.
0:25
Or you can just keep the default.
0:28
Click the Launch it
button when you're ready.
0:30
A new window will open with
the Treehouse Workspace.
0:33
Give it a minute to load.
0:36
When it launches, you'll see a sidebar on
the left with a single plain text file
0:37
named hello.rb, click that and it'll
load in the text editor on the right.
0:41
As you can see,
0:46
it includes just one single line of code,
that's the whole thing.
0:47
No defining classes or functions or any
of the other stuff that other programming
0:51
languages require before
you can get started.
0:56
Just one line of code and
this program is ready to run.
0:58
So, let's run it.
1:02
Click in the console area at the bottom.
1:03
You'll know it's been activated if
a blinking cursor appears down there.
1:05
Type ruby, a space, and
the name of our program file.
1:09
Hello dot RB.
1:13
Then hit enter.
1:15
Ruby will run our program and
print out the message from our code.
1:17
You can click in the editor and
change the message if you want.
1:21
So up here instead of Hello, Ruby!
1:24
I'm going to say, Hello, Jay!
1:25
Save your work by clicking in
the file menu and choosing save.
1:27
Then click on the console again and
rerun the program.
1:32
If you want you can just hit the up arrow
to bring up the previous command and
1:35
hit enter again, to run it again.
1:38
You see that this time it prints
out the new text that we've typed
1:40
in at the editor.
1:43
When you're done you can close the window,
1:44
don't worry your changes will be
saved on site's workspaces page.
1:46
Pretty cool right, because Ruby is so
simple and easy to use,
1:53
it's one of the most flexible
programming languages out there.
1:57
Ruby gets out of your way and
lets you code, the way you want to.
2:02
This flexibility has allowed Ruby
developers to create some incredibly
2:06
innovative software.
2:09
There's Bundler, a program that installs
libraries of reusable code for you, so
2:11
your app can easily use
code others have written.
2:15
There's SASS, a more powerful version of CSS, that lets you design styles for
2:18
web pages using less code.
2:23
There is Puppet, and Chef, two different
programs which can both set up entire
2:25
operating systems,
using directions in a simple text file.
2:29
And most importantly,
there is Ruby On Rail, which is arguably,
2:34
the world's most powerful web framework.
2:37
Rails lets you easily create sites that write
user data to a database, and
2:40
then serve it back up as webpages.
2:44
Rails in particular,
helps make Ruby popular.
2:47
And the majority of Ruby jobs out
there are working on Rails websites.
2:50
Once you understand the Ruby language, do
yourself a favor and go on to learn Rails.
2:54
You'll be glad you did.
2:59
Other languages are starting to copy ideas
that originated with these Ruby libraries.
3:00
This software was written in Ruby first,
because Ruby gives developers the freedom
3:05
to experiment and find the perfect
solution for their problem.
3:10
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