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Contents
module BerkeleyLibrary
module Util
module Strings
ASCII_0 = '0'.ord
ASCII_9 = '9'.ord
def ascii_numeric?(s)
s.chars.all? do |c|
ord = c.ord
ord >= ASCII_0 && ord <= ASCII_9
end
end
# Locates the point at which two strings differ
#
# @return [Integer, nil] the index of the first character in either string
# that differs from the other, or `nil` if the strings are identical,
# or are not strings
def diff_index(s1, s2)
return unless string_like?(s1, s2)
shorter, longer = s1.size > s2.size ? [s2, s1] : [s1, s2]
shorter.chars.each_with_index do |c, i|
return i if c != longer[i]
end
shorter.length if shorter.length < longer.length # otherwise they're equal
end
class << self
include Strings
end
private
def string_like?(*strs)
strs.all? { |s| s.respond_to?(:chars) && s.respond_to?(:size) }
end
end
end
end
Version data entries
12 entries across 12 versions & 2 rubygems