Class: MatchData

Inherits:
Object show all
Defined in:
lib/core_ext/match_data.rb

Instance Method Summary collapse

Instance Method Details

#last_match_index ⇒ Object 



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# File 'lib/core_ext/match_data.rb', line 34

def last_match_index
  index = length - 1
  to_a.reverse.each do |sub_match|
    return index if ! sub_match.nil?
    index -= 1
  end
end

#post_sub_match(index) ⇒ Object 



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# File 'lib/core_ext/match_data.rb', line 52

def post_sub_match(index)
  if index.abs >= length
    raise ArgumentError, "absolute value of index greater than length" 
  end
  
  index = length + index if index < 0

  string[offset(index)[1]...offset(0)[1]]
end

#pre_sub_match(index) ⇒ Object 



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# File 'lib/core_ext/match_data.rb', line 42

def pre_sub_match(index)
  if index.abs >= length
    raise ArgumentError, "absolute value of index greater than length" 
  end
  
  index = length + index if index < 0
  
  string[offset(0)[0]...offset(index)[0]]
end

#replace(replace_string) ⇒ Object 



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# File 'lib/core_ext/match_data.rb', line 19

def replace(replace_string)
    replace_string.gsub(/\\([0-9+&'`\\])/) {|sub| 
      case $1
      when '\\'
        '\\'
      when '`'
        pre_match
      when "'"
        post_match
      else
        to_a[sym2index($1)]
      end
    }
end

#sym2index(sym) ⇒ Object 



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# File 'lib/core_ext/match_data.rb', line 4

def sym2index(sym)
  case sym
  when '+', :last_match, :last, "last_match", "last"
    last_match_index
  when '&', :all, "all"
    0
  when /[0-9]+/
    sym.to_i
  when Integer
    sym
  else
    nil
  end
end