Ruby's rather clever in terms or how it handles string interpretation. Since variable names only start with special characters sometimes, it can't use Perl's trick of making the $ and @ character special in a string. So instead it uses a #{.....} notation. For example:

puts "Tocker is #{tocker}"
uses a local variable.

puts "Ticker is #{$ticker}"
uses a global variable

and

puts "Sign #{noentrysign.colour} and area #{noentrysign.area}"
calls an instance or accessory method on the object. There is a complete example of that code here.
(written 2008-03-21 18:23:43)

 R109 - Ruby - Strings and Regular Expressions

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Variable types in Ruby
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