Module: Gemmy::Patches::StringPatch::InstanceMethods::ExpandTabs

Defined in:
lib/gemmy/patches/string_patch.rb

Instance Method Summary collapse

Instance Method Details

#expand_tabs(n = 8) ⇒ Object

turns tabs to spaces

Raises:

  • (ArgumentError) 


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# File 'lib/gemmy/patches/string_patch.rb', line 203

def expand_tabs(n=8)
  n = n.to_int
  raise ArgumentError, "n must be >= 0" if n < 0
  return gsub(/\t/, "") if n == 0
  return gsub(/\t/, " ") if n == 1
  str = self.dup
  while
    str.gsub!(/^([^\t\n]*)(\t+)/) { |f|
      val = ( n * $2.size - ($1.size % n) )
      $1 << (' ' * val)
    }
  end
  str
end