method
extract_subdomain
v6.1.7.7 -
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Class: ActionDispatch::Http::URL
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extract_subdomain(host, tld_length)
public
Returns the subdomains of a host as a String given the domain level.
# Top-level domain example extract_subdomain('www.example.com', 1) # => "www" # Second-level domain example extract_subdomain('dev.www.example.co.uk', 2) # => "dev.www"