regex_sieve

RegexSeive

The RegexSieve functions in a manner similar a hash. The regex sieve is initialized with a hash where the keys are regular expressions and the values can be any valid Ruby object. The order of the keys matters. When the regex sieve is accessed using the array accessor [], it returns the first matching record.

sieve = RegexSieve.new({
  /(Invincible|Born & Raised) IPA/ => 'Craft IPA',
  /(Fresh Squeezed) IPA/           => 'Microbrew IPA',
  /IPA/                            => 'Other IPA'
})

sieve['Invincible IPA'] # => 'Craft IPA'
sieve['Awesome IPA']    # => 'Other IPA'
sieve['Kinda Pale Ale'] # => nil

By default, only the values are returned, but the key and all matching capture groups can optionally be returned.

result_and_match = sieve['Invincible IPA', :match]   # => {:value=>"Craft IPA", :match=>#<MatchData "Invincible IPA" 1:"Invincible">}
result_and_match[:match][1]                          # => 'Invincible'

result_and_key = sieve['Invincible IPA', :regex]     # => {:value=>"Craft IPA", :regex=>/(Invincible|Born & Raised) IPA/}

result_all = sieve['Invincible IPA', :regex, :match] # => {:value=>"Craft IPA", :regex=>/(Invincible|Born & Raised) IPA/, :match=>#<MatchData "Invincible IPA" 1:"Invincible">}