Remove emoji from string.

emoji_trimmer.rb

module EmojiTrimmer
  MATCHERS = [
    # Emoticons
    /[\u{1F600}-\u{1F6FF}]/,

    # Miscellaneous Symbols and Pictographs
    /[\u{1F300}-\u{1F5FF}]/,

    # Transport And Map Symbols
    /[\u{1F680}-\u{1F6FF}]/,

   # flags (iOS)
    /[\u{1F1E0}-\u{1F1FF}]/
  ]

  def self.trim(str)
    MATCHERS.reduce(str) do |result, pattern|
      result.replace(pattern, '')
    end
  end
end