/usr/lib/ruby/2.3.0/abbrev.rb is in libruby2.3 2.3.0-5ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 | # frozen_string_literal: false
#--
# Copyright (c) 2001,2003 Akinori MUSHA <knu@iDaemons.org>
#
# All rights reserved. You can redistribute and/or modify it under
# the same terms as Ruby.
#
# $Idaemons: /home/cvs/rb/abbrev.rb,v 1.2 2001/05/30 09:37:45 knu Exp $
# $RoughId: abbrev.rb,v 1.4 2003/10/14 19:45:42 knu Exp $
# $Id$
#++
##
# Calculates the set of unambiguous abbreviations for a given set of strings.
#
# require 'abbrev'
# require 'pp'
#
# pp Abbrev.abbrev(['ruby'])
# #=> {"ruby"=>"ruby", "rub"=>"ruby", "ru"=>"ruby", "r"=>"ruby"}
#
# pp Abbrev.abbrev(%w{ ruby rules })
#
# _Generates:_
# { "ruby" => "ruby",
# "rub" => "ruby",
# "rules" => "rules",
# "rule" => "rules",
# "rul" => "rules" }
#
# It also provides an array core extension, Array#abbrev.
#
# pp %w{ summer winter }.abbrev
#
# _Generates:_
# { "summer" => "summer",
# "summe" => "summer",
# "summ" => "summer",
# "sum" => "summer",
# "su" => "summer",
# "s" => "summer",
# "winter" => "winter",
# "winte" => "winter",
# "wint" => "winter",
# "win" => "winter",
# "wi" => "winter",
# "w" => "winter" }
module Abbrev
# Given a set of strings, calculate the set of unambiguous abbreviations for
# those strings, and return a hash where the keys are all the possible
# abbreviations and the values are the full strings.
#
# Thus, given +words+ is "car" and "cone", the keys pointing to "car" would
# be "ca" and "car", while those pointing to "cone" would be "co", "con", and
# "cone".
#
# require 'abbrev'
#
# Abbrev.abbrev(%w{ car cone })
# #=> {"ca"=>"car", "con"=>"cone", "co"=>"cone", "car"=>"car", "cone"=>"cone"}
#
# The optional +pattern+ parameter is a pattern or a string. Only input
# strings that match the pattern or start with the string are included in the
# output hash.
#
# 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"}
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
module_function :abbrev
end
class Array
# Calculates the set of unambiguous abbreviations for the strings in +self+.
#
# require 'abbrev'
# %w{ car cone }.abbrev
# #=> {"car"=>"car", "ca"=>"car", "cone"=>"cone", "con"=>"cone", "co"=>"cone"}
#
# The optional +pattern+ parameter is a pattern or a string. Only input
# strings that match the pattern or start with the string are included in the
# output hash.
#
# %w{ fast boat day }.abbrev(/^.a/)
# #=> {"fast"=>"fast", "fas"=>"fast", "fa"=>"fast", "day"=>"day", "da"=>"day"}
#
# Abbrev.abbrev(%w{car box cone}, "ca")
# #=> {"car"=>"car", "ca"=>"car"}
#
# See also Abbrev.abbrev
def abbrev(pattern = nil)
Abbrev::abbrev(self, pattern)
end
end
|