tokyorubyistmeetup のペアプロ課題その２(wip)

postal_code.rb

# -*- coding: utf-8 -*-
require "csv"

module PostalCode
  def self.find(postal_code)
    match = CSV.read(File.join(File.dirname(__FILE__), "../data/ken_all.csv")).find do |row|
      row[2] == postal_code.tr("-", "")
    end
    match && match[6,3]
  end

  def self.reverse_lookup(address)
    prefecture, suffix, others = address.split(/(県)|(都)|(道)|(府)/)
    array = CSV.read(File.join(File.dirname(__FILE__), '..', "#{prefecture + suffix}.csv")).find do |row|
      address =~ /#{row[1]}/
    end
    "#{array[0][0..2]}-#{array[0][3..6]}"
  end

  def convert_kanji_to_number(kanji)
    kanji.split('十').map do |number|
      convert_one_to_nine(number)
    end

    # 二十三 -> 23 (十 can be ignored!)
    # 二十 -> 20 (十 add 0)
    # 十 -> 10
  end

  def convert_one_to_nine(kanji)
    case kanji
    when '一'; 1
    when '二'; 2
    when '三'; 3
    when '四'; 4
    when '五'; 5
    when '六'; 6
    when '七'; 7
    when '八'; 8
    when '九'; 9
    when '十'; 10
    when '十一'; 11
    when '十二'; 12
    when '十三'; 13
    when '十四'; 14
    when '十五'; 15
    when '十六'; 16
    when '十七'; 17
    when '十八'; 18
    when '十九'; 19
    when '二十'; 20
    end
  end
end

split_csv.rb

#!/usr/bin/env ruby

require 'csv'
require 'pry'

hash = {}

CSV.read(File.join(File.dirname(__FILE__), "./data/ken_all.csv")).each do |row|
  prefecture = row[6]
  postal_code = row[2]
  address = row[6..8]
  if hash[prefecture].nil? || hash[prefecture].empty?
    hash[prefecture] = [[postal_code, address]]
  else
    hash[prefecture] << [postal_code, address]
  end
end

hash.each do |prefecture_name, prefecture_data|
  CSV.open("#{prefecture_name}.csv", "wb") do |csv|
    prefecture_data.each do |data|
      postal_code = data[0]
      address = data[1].join
      csv << [postal_code, address]
    end
  end
end