Contents

require 'bigdecimal'
require 'bigdecimal/util'

module FeCoreExt::CoreExt
end

module FeCoreExt::CoreExt::Array
  def median
    return if empty?
    sorted = sort
    len = sorted.length
    (sorted[(len - 1) / 2] + sorted[len / 2]) / 2.0
  end

  def sum
    inject(0) { |result, el| result + el }
  end

  def mean
    sum.to_d / size
  end
end

class Array
  include FeCoreExt::CoreExt::Array
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
fe_core_ext-0.1.12	lib/fe_core_ext/core_ext/array.rb