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Ruby Loops


After last week, I know you've been eagerly waiting for this, the fifth article in my Ruby on Rails series. This one will give you an in-depth look at Loops, Methods, and Blocks. Well maybe Blocks. You'll have to see. So without a bunch of unnecessary yammering, let's get to it.

Author Info:
By: James Payne
Rating: 5 stars5 stars5 stars5 stars5 stars / 16
October 22, 2007
TABLE OF CONTENTS:
  1. · Ruby Loops
  2. · The While Loop
  3. · Stop that Loop!
  4. · Reach Out and Touch Someone
  5. · Scope

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Ruby Loops - Scope
(Page 5 of 5 )

You can define variables within methods (giving them local scope). This means that you can only use the variable within the method and not outside of it.


secret_agent = “James Bond”


def spy_man()

text = “Bond”

puts text

end


spy_man


puts text

This code will print the following:

  Bond

  James Bond

As you can see in the code we have two variables named text. Normally this is not allowed. But since one of the variables named text is within a method, and therefore has local scope, the program does not see it outside of the method and allows you to have two variables with the same name.

That concludes this episode of Ruby for the Newbie. In the next article we will look at Classes and Objects, and beyond that we will explore working with Rail and creating web pages. So check back often for more articles on these topics.

Till then...


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