Posted 4 months ago. Visible to the public. Repeats.

Ruby: You can nest regular expressions

Ruby lets you re-use existing RegExp objects by interpolating it into new patterns:

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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.

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Henning Koch
Last edit:
4 months ago
by Henning Koch
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Posted by Henning Koch to makandra dev
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