# Using "eval" to display a summary

**URL:** <https://www.ruby-forum.com/t/using-eval-to-display-a-summary/157294>\
**Category:** Rails\
**Created:** [January 9, 2009, 8:03am UTC](https://www.ruby-forum.com/t/using-eval-to-display-a-summary/157294 "2009-01-09T08:03:52Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![rakenewuser](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/e480ec/32.png) [@rakenewuser](https://www.ruby-forum.com/u/rakenewuser)\
**Post date:** [January 9, 2009, 8:03am UTC](https://www.ruby-forum.com/t/using-eval-to-display-a-summary/157294/1 "2009-01-09T08:03:52Z")

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Hi,

Anyone can helps to display a summary list instead of a details list.

Here is my code;

recgroup = eval(tablename.fieldname) if !tablename.fieldname.nil?

puts recgroup[:textgroup] + recgroup[:countgroup].inject(0) {|sum,  
room| sum + room.length}.to\_s + '; ’ + recgroup[:countgroup].length.to\_s  
if !recgroup.nil?

It was displays as a details;

textdata1 1 1  
textdata2 1 2  
textdata1 2 2

But I need to display as a summary;

textdata1 3 3  
textdata2 1 2

Thanks!