Abbrev 模組

計算給定字串組的明確縮寫。

require 'abbrev'
require 'pp'

pp Abbrev.abbrev(['ruby'])
#=>  {"ruby"=>"ruby", "rub"=>"ruby", "ru"=>"ruby", "r"=>"ruby"}

pp Abbrev.abbrev(%w{ ruby rules })

產生

{ "ruby"  =>  "ruby",
  "rub"   =>  "ruby",
  "rules" =>  "rules",
  "rule"  =>  "rules",
  "rul"   =>  "rules" }

它也提供陣列核心擴充功能，Array#abbrev。

pp %w{ summer winter }.abbrev

產生

{ "summer"  => "summer",
  "summe"   => "summer",
  "summ"    => "summer",
  "sum"     => "summer",
  "su"      => "summer",
  "s"       => "summer",
  "winter"  => "winter",
  "winte"   => "winter",
  "wint"    => "winter",
  "win"     => "winter",
  "wi"      => "winter",
  "w"       => "winter" }

常數

VERSION

公開類別方法

abbrev(words, pattern = nil) 按一下以切換來源

給定一組字串，計算這些字串的明確縮寫，並傳回一個雜湊，其中金鑰是所有可能的縮寫，而值是完整字串。

因此，給定 words 是「car」和「cone」，指向「car」的金鑰會是「ca」和「car」，而指向「cone」的金鑰會是「co」、「con」和「cone」。

require 'abbrev'

Abbrev.abbrev(%w{ car cone })
#=> {"ca"=>"car", "con"=>"cone", "co"=>"cone", "car"=>"car", "cone"=>"cone"}

選用的 pattern 參數是樣式或字串。只有符合樣式或以字串開頭的輸入字串會包含在輸出雜湊中。

Abbrev.abbrev(%w{car box cone crab}, /b/)
#=> {"box"=>"box", "bo"=>"box", "b"=>"box", "crab" => "crab"}

Abbrev.abbrev(%w{car box cone}, 'ca')
#=> {"car"=>"car", "ca"=>"car"}

# File lib/abbrev.rb, line 74
def abbrev(words, pattern = nil)
  table = {}
  seen = Hash.new(0)

  if pattern.is_a?(String)
    pattern = /\A#{Regexp.quote(pattern)}/  # regard as a prefix
  end

  words.each do |word|
    next if word.empty?
    word.size.downto(1) { |len|
      abbrev = word[0...len]

      next if pattern && pattern !~ abbrev

      case seen[abbrev] += 1
      when 1
        table[abbrev] = word
      when 2
        table.delete(abbrev)
      else
        break
      end
    }
  end

  words.each do |word|
    next if pattern && pattern !~ word

    table[word] = word
  end

  table
end

私人執行個體方法

abbrev(words, pattern = nil) 按一下以切換來源

給定一組字串，計算這些字串的明確縮寫，並傳回一個雜湊，其中金鑰是所有可能的縮寫，而值是完整字串。

因此，給定 words 是「car」和「cone」，指向「car」的金鑰會是「ca」和「car」，而指向「cone」的金鑰會是「co」、「con」和「cone」。

require 'abbrev'

Abbrev.abbrev(%w{ car cone })
#=> {"ca"=>"car", "con"=>"cone", "co"=>"cone", "car"=>"car", "cone"=>"cone"}

選用的 pattern 參數是樣式或字串。只有符合樣式或以字串開頭的輸入字串會包含在輸出雜湊中。

Abbrev.abbrev(%w{car box cone crab}, /b/)
#=> {"box"=>"box", "bo"=>"box", "b"=>"box", "crab" => "crab"}

Abbrev.abbrev(%w{car box cone}, 'ca')
#=> {"car"=>"car", "ca"=>"car"}

# File lib/abbrev.rb, line 74
def abbrev(words, pattern = nil)
  table = {}
  seen = Hash.new(0)

  if pattern.is_a?(String)
    pattern = /\A#{Regexp.quote(pattern)}/  # regard as a prefix
  end

  words.each do |word|
    next if word.empty?
    word.size.downto(1) { |len|
      abbrev = word[0...len]

      next if pattern && pattern !~ abbrev

      case seen[abbrev] += 1
      when 1
        table[abbrev] = word
      when 2
        table.delete(abbrev)
      else
        break
      end
    }
  end

  words.each do |word|
    next if pattern && pattern !~ word

    table[word] = word
  end

  table
end