Comparison question

[Peter Vanderhaden]

I'm looking at the Comparable module in a book, and I can't figure out
how to do a simple comparison. What I want to do is a loop based on a
counter. If the counter is less than 3, I want to execute the loop,
otherwise I want the loop to end. I'm used to coding something like if
$cnt < 3 but in Ruby that doesn't seem to work. Obviously I'm new to OO
programming, so can someone give me a simple example of how to do this,
or point me to a simple tutorial on how to do comparisons?
Thanks

 

[Peter Vanderhaden]

Never mind, I figured it out, sorry!

I'm looking at the Comparable module in a book, and I can't figure out
how to do a simple comparison. What I want to do is a loop based on a
counter. If the counter is less than 3, I want to execute the loop,
otherwise I want the loop to end. I'm used to coding something like if
$cnt < 3 but in Ruby that doesn't seem to work. Obviously I'm new to OO
programming, so can someone give me a simple example of how to do this,
or point me to a simple tutorial on how to do comparisons?
Thanks

 

[7stud --]

Never mind, I figured it out, sorry!

Here are some ways you might not have thought of:

a)
arr = ["hello", "world", "goodbye", "mars"]

arr.each_with_index do |elmt, i|
if i == 3
break
end

puts elmt

end

--output:--
hello
world
goodbye


b)
(0..2).each {|i| print i}

--output:--
012


c)
3.times {|i| puts i}

--output:--
0
1
2

 

[Robert Klemme]

I'm looking at the Comparable module in a book, and I can't figure out
how to do a simple comparison. What I want to do is a loop based on a
counter. If the counter is less than 3, I want to execute the loop,
otherwise I want the loop to end. I'm used to coding something like if
$cnt < 3 but in Ruby that doesn't seem to work. Obviously I'm new to OO
programming, so can someone give me a simple example of how to do this,
or point me to a simple tutorial on how to do comparisons?

http://www.google.com/search?q=ruby+tutorial
http://www.ruby-doc.org/

robert