Ruby lets you re-use existing RegExp objects by interpolating it into new patterns:
locales_pattern = /de|en|fr|es/i
html_tag_pattern = /<html lang="#{locales_pattern}">/
Any modifiers like /i or /x will be preserved within the interpolated region, which is pretty cool. So in the example above only the interpolated locales are case-insensitive, while the pattern around it (/<html .../) remains case-sensitive.
Posted by Henning Koch to makandra dev (2021-09-29 09:28)