Gridify app helper

gridify.rb

def gridify(collection, partial, opts = {})
    rows = []
    coll_copy = collection.dup
    cols = opts[:cols] || 3
    begin
      row = []
      cols.times { row << coll_copy.shift }
      row.compact!
      rows << row
    end while coll_copy.present?
    
    width = opts[:col_width] || 3
    output = ""
    rows.each do |row|
      output << "<div class='row-fluid'>\n"
      row.each do |col|
        output << "<div class='span#{width}'>\n"
        output << render({partial: partial, object: col}.merge(opts))
        output << "\n</div>"
      end
      output << "\n</div>"
    end
    
    output.html_safe
  end