ogijun

class Array
  def bsearch(e, l = 0, u = length - 1)
     if l <= u
       m = (l + u)/2
       e < self[m] ? u = m - 1 : l = m + 1
       e == self[m] ? m : bsearch(e, l, u)
     end
  end
end

ogijun

require 'json'

def d2j(data)
  case data
  when Hash
    if data.keys.length == 1 && %w[S N M L NULL BOOL].include?(data.keys.first)
      key, value = data.first
      case key
      when 'S', 'N'
        value.is_a?(String) && key == 'N' ? value.to_i : value