These are a few functions that I use in every rails project I do so I figured I would pass them along. Perhaps someone will find them useful.

This first one is a function to get a page number for pagination based on start index and result set size.

  def get_page(_start,_limit)
    start = (_start || 1).to_i
    size = (_limit || 25).to_i
    return ((start/size).to_i)+1
  end

This function returns an age based on birth date thats pulled from a DateTime db col.

  def age(birthdate)
    unless birthdate.nil?
      age = Date.today.year - birthdate.year
      if Date.today.month < birthdate.month ||
      (Date.today.month == birthdate.month && birthdate.day >= Date.today.day)
        age = age - 1
      end
      return age
    else
      return 0
    end
  end

This function takes a string and a length and truncates it while also appending … to the end.

  def ellipses(str,length)
    if str.nil?
      return
    else
      return (str.length > length) ? "#{str[0,length]}…” : str
    end
  end

This entry was posted on Saturday, August 11th, 2007 at 4:25 am and is filed under ruby, tutorials. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.