method
extract_subdomain

v4.0.2 -
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Class: ActionDispatch::Http::URL
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extract_subdomain(host, tld_length = @@tld_length)
public
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# File actionpack/lib/action_dispatch/http/url.rb, line 28 def extract_subdomain(host, tld_length = @@tld_length) extract_subdomains(host, tld_length).join('.') end