bat/tests/syntax-tests/source/Ruby/output.rb
2020-10-04 15:15:34 +02:00

57 lines
1.4 KiB
Ruby
Vendored

class RepeatedSubstring
def find_repeated_substring(s)
# catch the edge cases
return 'NONE' if s == ''
# check if the string consists of only one character => "aaaaaa" => "a"
return s.split('').uniq[0] if s.split('').uniq.length == 1
searched = []
longest_prefix = 0
long_prefix = ''
(0..s.length - 1).each do |i|
next if searched.include? s[i]
searched.push(s[i])
next_occurrences = next_index(s, i + 1, s[i])
next_occurrences.each do |next_occurrence|
next if next_occurrence == -1
prefix = ge_prefix(s[i..next_occurrence - 1], s[next_occurrence..s.length])
if prefix.length > longest_prefix
longest_prefix = prefix.length
long_prefix = prefix
end
end
end
# if prefix == " " it is a invalid sequence
return 'NONE' if long_prefix.strip.empty?
long_prefix
end
def get_prefix(s1, s2)
prefix = ''
min_length = [s1.length, s2.length].min
return '' if s1.nil? || s2.nil?
(0..min_length - 1).each do |i|
return prefix if s1[i] != s2[i]
prefix += s1[i]
end
prefix
end
def next_index(seq, index, value)
indexes = []
(index..seq.length).each do |i|
indexes.push(i) if seq[i] == value
end
indexes
end
def find_repeated_substring_file(file_path)
File.open(file_path).read.each_line.map { |line| find_repeated_substring(line) }
end
end