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Command line Ruby library reference.
bash$ ri File::open
------------------------------------------------------------- File::open
File.open( fileName, aModeString="r" ) -> file
File.open( fileName [, aModeNum [aPermNum]] ) -> file
File.open( fileName, aModeString="r" ) {| file | block } -> nil
File.open( fileName [, aModeNum [aPermNum]] ) {| file | block } ->
nil
------------------------------------------------------------------------
With no associated block, open is a synonym for File::new. If the
optional code block is given, it will be passed file as an
argument, and the file will automatically be closed when the block
terminates. In this instance, File::open returns nil.
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