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Test Your Knowledge in Computers #241
Difficulty: Easy
In 1973, a transatlantic submarine fiber optic link connected the Norwegian Seismic Array (NORSAR) to the ARPANET, making Norway the first country outside the US to be connected to the network.
True or False?
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tell(1t) [opensolaris man page]

tell(1T)						       Tcl Built-In Commands							  tell(1T)

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NAME
tell - Return current access position for an open channel SYNOPSIS
tell channelId _________________________________________________________________ DESCRIPTION
Returns an integer string giving the current access position in channelId. This value returned is a byte offset that can be passed to seek | in order to set the channel to a particular position. Note that this value is in terms of bytes, not characters like read. The value returned is -1 for channels that do not support seeking. ChannelId must be an identifier for an open channel such as a Tcl standard channel (stdin, stdout, or stderr), the return value from an | invocation of open or socket, or the result of a channel creation command provided by a Tcl extension. EXAMPLE
Read a line from a file channel only if it starts with foobar: # Save the offset in case we need to undo the read... set offset [tell $chan] if {[read $chan 6] eq "foobar"} { gets $chan line } else { set line {} # Undo the read... seek $chan $offset } SEE ALSO
file(1T), open(1T), close(1T), gets(1T), seek(1T), Tcl_StandardChannels(3TCL) KEYWORDS
access position, channel, seeking ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +--------------------+-----------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +--------------------+-----------------+ |Availability | SUNWTcl | +--------------------+-----------------+ |Interface Stability | Uncommitted | +--------------------+-----------------+ NOTES
Source for Tcl is available on http://opensolaris.org. Tcl 8.1 tell(1T)

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