# Gsub ignorecase unicode

**URL:** <https://www.ruby-forum.com/t/gsub-ignorecase-unicode/122819>\
**Category:** Rails\
**Created:** [December 12, 2007, 3:45pm UTC](https://www.ruby-forum.com/t/gsub-ignorecase-unicode/122819 "2007-12-12T15:45:55Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ferro\_i](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/f/6a8cbe/32.png) [@ferro\_i](https://www.ruby-forum.com/u/ferro_i)\
**Post date:** [December 12, 2007, 3:45pm UTC](https://www.ruby-forum.com/t/gsub-ignorecase-unicode/122819/1 "2007-12-12T15:45:55Z")

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Hey guys

‘öçğüş’.chars.upcase =\> “ÖÇĞÜŞ” work perfectly

How do you gsub the special characters (åäöü)?  
I use utf-8 rails 1.2.

“AÖŞaöş”.chars.gsub(/([aöş])/i, ’ •\1• ')  
=\> •A• ÖŞ •a• •ö• •ş•

gsub not work in unicode characters

How did you solve this problem?

Ferit

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**Author:** ![ferro\_i](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/f/6a8cbe/32.png) [@ferro\_i](https://www.ruby-forum.com/u/ferro_i)\
**Post date:** [December 12, 2007, 7:42pm UTC](https://www.ruby-forum.com/t/gsub-ignorecase-unicode/122819/2 "2007-12-12T19:42:38Z")

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On Dec 12, 2007, at 6:45 AM, Ferit Öztosun wrote:

> How did you solve this problem?

I spent several days working on this and finally managed to piece  
together some help from the ruby list. If you’re into understanding  
it all, try this thread: [Unicode in Regex - Ruby - Ruby-Forum](http://www.ruby-forum.com/topic/133538)

First, make sure you have this line at the top of your environment.rb  
file:

$KCODE = ‘UTF8’

Next, make sure your regex ends with /u as in /\w+/u

Finally, this is how you specify UTF-8 characters:

‘üéåë’.gsub(/#{“\303\253”}/u, ‘x’)

Ranges would like /#{“\303\200”}-#{“\303\226”}/u

You have to use the octal numbers, so that one above would replace ë  
with x.

–  
def gw  
acts\_as\_n00b  
writes\_at(www.railsdev.ws)  
end

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<div class="post-metadata">

**Author:** ![ferro\_i](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/f/6a8cbe/32.png) [@ferro\_i](https://www.ruby-forum.com/u/ferro_i)\
**Post date:** [December 13, 2007, 9:00am UTC](https://www.ruby-forum.com/t/gsub-ignorecase-unicode/122819/3 "2007-12-13T09:00:44Z")

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> $KCODE = ‘UTF8’
> 
> Next, make sure your regex ends with /u as in /\w+/u
> 
> Finally, this is how you specify UTF-8 characters:
> 
> ‘üéåë’.gsub(/#{"\303\253"}/u, ‘x’)
> 
> Ranges would like /#{"\303\200"}-#{"\303\226"}/u
> 
> You have to use the octal numbers, so that one above would replace ë  
> with x.

Sory i explained missing

i can do already unicode in regex

example: ‘üéåëË’.gsub(/ë/, ‘x’)  
=\> üéåxË

but i want to unicode with ignorecase /i  
because search result must be with bold

example: ‘üéåËafe’.gsub(/(åë)/i, ‘ **\1** ’  
result must be like =\> “üé **åË** afe”, but ignorecase not work

‘ë’.chars.upcase =\> “Ë” work perfectly