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Rev 85908 Rev 85925
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  \code{seek} with \code{where = NA} returns the current byte offset
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  \code{seek} with \code{where = NA} returns the current byte offset
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  of a connection (from the beginning), and with a non-missing \code{where}
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  of a connection (from the beginning), and with a non-missing \code{where}
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  argument the connection is re-positioned (if possible) to the
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  argument the connection is re-positioned (if possible) to the
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  specified position.  \code{isSeekable} returns whether the connection
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  specified position.  \code{isSeekable} returns whether the connection
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  in principle supports \code{seek}: currently only (possibly
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  in principle supports \code{seek}: currently only (possibly
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  gz-compressed) file connections do.
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  \abbr{gz}-compressed) file connections do.
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  \code{where} is stored as a real but should represent an integer:
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  \code{where} is stored as a real but should represent an integer:
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  non-integer values are likely to be truncated.  Note that the possible
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  non-integer values are likely to be truncated.  Note that the possible
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  values can exceed the largest representable number in an \R
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  values can exceed the largest representable number in an \R
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  \code{integer} on 64-bit builds, and on some 32-bit builds.
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  \code{integer} on 64-bit builds, and on some 32-bit builds.