Class: String

Inherits:
Object show all
Defined in:
lib/diakonos/core-ext/string.rb

Instance Method Summary collapse

Instance Method Details

#expand_tabs(tab_size) ⇒ Object 



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# File 'lib/diakonos/core-ext/string.rb', line 12

def expand_tabs( tab_size )
  s = dup
  while s.sub!( /\t/ ) { |match_text|
    match = Regexp.last_match
    index = match.begin( 0 )
    " " * ( tab_size - ( index % tab_size ) )
  }
  end
  s
end

#group_index(regexp, offset = 0) ⇒ Object

Works like normal String#index except returns the index of the first matching regexp group if one or more groups are specified in the regexp. Both the index and the matched text are returned.



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# File 'lib/diakonos/core-ext/string.rb', line 41

def group_index( regexp, offset = 0 )
  if regexp.class != Regexp
    return index( regexp, offset )
  end

  i = nil
  match_text = nil
  working_offset = 0
  loop do
    index( regexp, working_offset )
    match = Regexp.last_match
    if match
      i = match.begin( 0 )
      match_text = match[ 0 ]
      if match.length > 1
        # Find first matching group
        1.upto( match.length - 1 ) do |match_item_index|
          if match[ match_item_index ]
            i = match.begin( match_item_index )
            match_text = match[ match_item_index ]
            break
          end
        end
      end

      break if i >= offset
    else
      i = nil
      break
    end
    working_offset += 1
  end

  [ i, match_text ]
end

#group_rindex(regexp, offset = length) ⇒ Object

Works like normal String#rindex except returns the index of the first matching regexp group if one or more groups are specified in the regexp. Both the index and the matched text are returned.



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# File 'lib/diakonos/core-ext/string.rb', line 80

def group_rindex( regexp, offset = length )
  if regexp.class != Regexp
    return rindex( regexp, offset )
  end

  i = nil
  match_text = nil
  working_offset = length
  loop do
    rindex( regexp, working_offset )
    match = Regexp.last_match
    if match
      i = match.end( 0 ) - 1
      match_text = match[ 0 ]
      if match.length > 1
        # Find first matching group
        1.upto( match.length - 1 ) do |match_item_index|
          if match[ match_item_index ]
            i = match.end( match_item_index ) - 1
            match_text = match[ match_item_index ]
            break
          end
        end
      end

      if match_text == ""
        # Assume that an empty string means that it matched $
        i += 1
      end

      break if i <= offset
    else
      i = nil
      break
    end
    working_offset -= 1
  end

  [ i, match_text ]
end

#newline_split ⇒ Object 



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# File 'lib/diakonos/core-ext/string.rb', line 23

def newline_split
  retval = split( /\\n/ )
  if self =~ /\\n$/
    retval << ""
  end
  if retval.length > 1
    retval[ 0 ] << "$"
    retval[ 1..-2 ].collect do |el|
      "^" << el << "$"
    end
    retval[ -1 ] = "^" << retval[ -1 ]
  end
  retval
end

#to_b ⇒ Object 



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# File 'lib/diakonos/core-ext/string.rb', line 3

def to_b
  case downcase
  when "true", "t", "1", "yes", "y", "on", "+"
    true
  else
    false
  end
end