Access to the case/when variable

Ruby
1

Is there a way to access the variable being tossed through the
case/when structure?

case object.size.to_s
when /33/

…

when /44/

…

else
abort "Invalid variable: " + ???

Is there a way to access the variable being tossed through

case/when?

something like: $_, or $!

end

One can always do this:
x = object.size.to_s
case x
when /3ft/
when /4cm/
else
abort “Bad match: #{x}”
end

But it would save a line to be able to access the actual variable being
used in the case/when structure.

Thanks

2

case x = object.size.to_s
when /33/: # whatever
when /44/: #etc.
else
x = 999

whatever

end

Basically a combination approach. :slight_smile:

–Jeremy

On 1/3/07, bwv549 [email protected] wrote:

Is there a way to access the variable being tossed through

abort “Bad match: #{x}”
end

But it would save a line to be able to access the actual variable being
used in the case/when structure.

Thanks

–
My free Ruby e-book:
http://www.humblelittlerubybook.com/book/

My blogs:

http://www.rubyinpractice.com/

3

On 03.01.2007 17:32, bwv549 wrote:

Is there a way to access the variable being tossed through the
case/when structure?

You mean object not variable. But no.

end
But it would save a line to be able to access the actual variable being
used in the case/when structure.

If you want to save a line you can do

case x = object.size.to_s
…

Btw, why do you convert to string and then use regexps on the name? Do
you want to check for numbers with all the same digits? You can do that
with this RX: /^(\d)\1*$/

Kind regards

robert