/usr/lib/ruby/2.3.0/rubygems/text.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 | # frozen_string_literal: false
require 'rubygems'
##
# A collection of text-wrangling methods
module Gem::Text
##
# Wraps +text+ to +wrap+ characters and optionally indents by +indent+
# characters
def format_text(text, wrap, indent=0)
result = []
work = text.dup
while work.length > wrap do
if work =~ /^(.{0,#{wrap}})[ \n]/ then
result << $1.rstrip
work.slice!(0, $&.length)
else
result << work.slice!(0, wrap)
end
end
result << work if work.length.nonzero?
result.join("\n").gsub(/^/, " " * indent)
end
def min3 a, b, c # :nodoc:
if a < b && a < c then
a
elsif b < c then
b
else
c
end
end
# This code is based directly on the Text gem implementation
# Returns a value representing the "cost" of transforming str1 into str2
def levenshtein_distance str1, str2
s = str1
t = str2
n = s.length
m = t.length
return m if (0 == n)
return n if (0 == m)
d = (0..m).to_a
x = nil
str1.each_char.each_with_index do |char1,i|
e = i+1
str2.each_char.each_with_index do |char2,j|
cost = (char1 == char2) ? 0 : 1
x = min3(
d[j+1] + 1, # insertion
e + 1, # deletion
d[j] + cost # substitution
)
d[j] = e
e = x
end
d[m] = x
end
return x
end
end
|