module Helpers

# File lib/helpers.rb, line 29
def decimals(a)
  num = 0
  while(a != a.to_i)
      num += 1
      a *= 10
  end
  num
end

# File lib/helpers.rb, line 2
def get_rows_from_csv(filename)
  gem_root = File.expand_path("../..", __FILE__)
  csv_text = File.read("#{gem_root}/lib/tables/#{filename}")
  csv_headers = CSV.parse(csv_text, headers: true).headers
  
  keys = csv_headers
  csv = CSV.parse(csv_text, headers: false).map { |a| Hash[ keys.zip(a) ] }

  # convert strings as floats
  csv.each do |row|
    row.each_pair { | k, v | row[k] = Float(v) rescue v }
  end

  # change last row[:max] to infinity
  last_row = csv.length - 1
  csv[last_row]["max"] = Float::INFINITY

  # delete first row
  csv.shift

  csv
end

# File lib/helpers.rb, line 25
def with_excess_centavo?(a)
  decimals(a) > 2
end