Module: BerkeleyLibrary::Util::Strings

Extended by:
Strings
Included in:
Strings
Defined in:
lib/berkeley_library/util/strings.rb

Constant Summary collapse

ASCII_0 = 
'0'.ord
ASCII_9 = 
'9'.ord

Instance Method Summary collapse

Instance Method Details

#ascii_numeric?(s) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/berkeley_library/util/strings.rb', line 8

def ascii_numeric?(s)
  s.chars.all? do |c|
    ord = c.ord
    ord.between?(ASCII_0, ASCII_9)
  end
end

#diff_index(s1, s2) ⇒ Integer?

Locates the point at which two strings differ

Returns:

  • (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



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# File 'lib/berkeley_library/util/strings.rb', line 20

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