[lnkForumImage]
TotalShareware - Download Free Software
Confronta i prezzi di migliaia di prodotti.
Asp Forum
 Home | Login | Register | Search 


 

Forums >

comp.lang.ruby

Variables in REXML

54Sandgroper

3/27/2006 12:14:00 PM

Real nuby question.

This works fine...
irb> puts root.elements['foo/bar[3]'].text
three

I can't work out how to do this...
irb> i = 3
irb> puts root.elements['foo/bar[i]'].text

I keep getting error message
NoMethodError: undefined method `text' for nil:NilClass

I've tried defining "i" every which way -- [i], [@i] and others.

irb> $i = 3
irb> [${i}]
doesn't error, but it outputs as if i = 1.

All of the REXML examples for text nodes that I have been able to track
down have the index hard coded, or use .each

Can someone point me in the right direction?
3 Answers

Paul Battley

3/27/2006 12:24:00 PM

0

I think this is the string interpolation you're looking for: root.elements["foo/bar[#{i}]"].textPaul.

Jerome Zago

3/27/2006 12:25:00 PM

0

> I can't work out how to do this...
> irb> i = 3
> irb> puts root.elements['foo/bar[i]'].text

Please try:
puts root.elements["foo/bar[#{i}]"].text

54Sandgroper

3/27/2006 1:56:00 PM

0

On Mon, 27 Mar 2006 21:24:48 +0900, Jerome Zago wrote:

>> I can't work out how to do this...
>> irb> i = 3
>> irb> puts root.elements['foo/bar[i]'].text
>
> Please try:
> puts root.elements["foo/bar[#{i}]"].text

Aha! The double quotes did the trick.

I had unsucessfully tried
puts root.elements['foo/bar[#{i}]'].text

Thanks a million!