Using ActiveSupport

ActiveSupport comes with a #transliterate method which replaces characters with their low-ASCII equivalent (to strip accents etc.:):

ActiveSupport::Inflector.transliterate('aäoöuü') # => "aaoouu"

You can also add custom rules in your I18n dictionary like this:

de:
  i18n:
    transliterate:
      rule:
        Ä: 'Ae'
        Ö: 'Oe'
        Ü: 'Ue'
        ä: 'ae'
        ö: 'oe'
        ü: 'ue'
        ß: 'ss'

With this you get:

ActiveSupport::Inflector.transliterate('aäoöuü') # => "aaeooeuue"

Using a Unicode-aware regexp

you can use the following code (as taken from the linked article):

string.mb_chars.normalize(:kd).gsub(/[^\x00-\x7F]/n,'').downcase.to_s

Using Iconv

Using Iconv (with a //TRANSLIT charset) does not work reliably, since transliteration depends on the set locale, and Ruby's Iconv wrapper does not expose functionality to set it.

Henning Koch

makandra.de

Say thanks8

Last edit

2022-11-28

Michael Leimstädtner

Keywords

rails, unicode, letters, utf, strings, 7-bit

License

Source code in this card is licensed under the MIT License.

Async control flow in JavaScript: Promises, Microtasks, async/await

Slides for Henning's talk on Sep 21st 2017.

Understanding sync vs. async control flow

Talking to synchronous (or "blocking") API

print('script start')
html = get('/foo')
print(html)
print('s...

Delivering Carrierwave attachments to authorized users only

Preparation

To attach files to your records, you will need a new database column representing the filename of the file. To do this, add a new migration (rails g migration <name>) with the following content:

class AddAttachmentToNotes...

Posted by Henning Koch to makandra dev (2012-06-27 13:39)

Ruby: Replacing Unicode characters with a 7-bit transliteration

Using ActiveSupport

Using a Unicode-aware regexp

Using Iconv

Related cards:

Understanding sync vs. async control flow

Talking to synchronous (or "blocking") API

Summary

Preparation

Introduction