Module: Wareki::Kansuji

Defined in:
lib/wareki/kansuji.rb

Overview

Utilities of kansuji/integer converter.

Constant Summary collapse

UNIT_SUFFIX1 = 
{
  '千' => 1000,
  '百' => 100,
  '十' => 10,
  '' => 1,
}.freeze
UNIT_SUFFIX2 = 
{
  '京' => 10_000_000_000_000_000,
  '兆' => 1_000_000_000_000,
  '億' => 100_000_000,
  '万' => 10_000,
  '' => 1,
}.freeze

Class Method Summary collapse

Class Method Details

.i_to_kan(num) ⇒ Object Also known as: i2k 



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# File 'lib/wareki/kansuji.rb', line 72

def i_to_kan(num)
  ret = ''
  UNIT_SUFFIX2.each do |unit4, rank4|
    i4 = (num / rank4).to_i % 10_000
    next if i4.zero?

    if i4 == 1
      ret += "一#{unit4}"
      next
    end

    UNIT_SUFFIX1.each do |unit1, rank1|
      i1 = (i4 / rank1).to_i % 10
      next if i1.zero?

      if i1 == 1 && unit1 != ''
        ret += unit1
      else
        ret += i1.to_s.tr('123456789', '一二三四五六七八九') + unit1
      end
    end
    ret += unit4
  end
  ret
end

.i_to_zen(num) ⇒ Object Also known as: i2z 



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# File 'lib/wareki/kansuji.rb', line 98

def i_to_zen(num)
  num.to_s.tr('0123456789', '０１２３４５６７８９')
end

.kan_to_i(str) ⇒ Object Also known as: k2i 



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# File 'lib/wareki/kansuji.rb', line 20

def kan_to_i(str)
  str = str.to_s.tr(
    '〇一二三四五六七八九０１２３４５６７８９零正元朔壱壹弌弐貳貮参參弎肆伍陸漆質柒捌玖拾什陌佰阡仟萬',
    '01234567890123456789011111122233345677789十十百百千千万'
  )
  ret3 = 0
  ret4 = 0
  curnum = nil
  str.each_char do |c|
    case c
    when '1', '2', '3', '4', '5', '6', '7', '8', '9'
      if curnum
        curnum *= 10
      else
        curnum = 0
      end
      curnum += c.to_i
    when '0'
      curnum and curnum *= 10
    when '卄', '廿'
      ret3 += 20
      curnum = nil
    when '卅', '丗'
      ret3 += 30
      curnum = nil
    when '卌'
      ret3 += 40
      curnum = nil
    when '皕'
      ret3 += 200
      curnum = nil
    when '万', '億', '兆', '京', '垓'
      if curnum
        ret3 += curnum
        curnum = nil
      end
      ret3 = 1 if ret3.zero?
      ret4 += ret3 * 10**((%w[万 億 兆 京 垓].index(c) + 1) * 4)
      ret3 = 0
    when '十', '百', '千'
      curnum ||= 1
      ret3 += curnum * 10**(%w[十 百 千].index(c) + 1)
      curnum = nil
    end
  end
  if curnum
    ret3 += curnum
    curnum = nil
  end
  ret4 + ret3
end