# open_as_string.rb

Path: | lib/facets/core/file/self/open_as_string.rb
Last Update: | Sun Oct 26 07:27:30 +0000 2008

Opens a file as a string and writes back the string to the file at the end of the block.

Returns the number of written bytes or `nil` if the file wasn‘t modified.

Note that the file will even be written back in case the block raises an exception.

Mode can either be "b" or "+" and specifies to open the file in binary mode (no mapping of the plattform‘s newlines to "\n" is done) or to append to it.

## Usage

      # Reverse contents of "message"
      File.open_as_string("message") { |str| str.reverse! }

      # Replace "foo" by "bar" in "binary"
      File.open_as_string("binary", "b") { |str| str.gsub!("foo", "bar") }

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