Answers to Part 2 Exercises

	Answers to Part 2 Exercises

	Solution to "EXPORT" Problem

	Typing:

	1 ; ?EXPORT? delete

	will do it. By starting from the first line in the file and
	searching backwards, you guarantee the the first line to be
	searched will be the last line of the file (due to wraparound),
	then the second-to-last line, etcetera. As soon as the editor
	finds a match it stops, so there cannot be another "EXPORT" lower
	down in the file.


	Solution to First-Line Problem

	This requires two commands:

	$ print
	/EXPORT/ delete

	The first command prints the last line in the file, which is not
	helpful in itself, but also leaves that last line as the current
	line. Then, the address of the second command causes a forward
	search and, due to wraparound, the search must begin with the
	file's first line.


	Solution to Noninclusive Problem

	Just add a plus sign after the address before the comma, and a
	minus sign to the address after it, like this:

	?abc? + , /xyz/ -

	Each of these offsets moves one line toward the center of the text
	section the combined address specifies, so each has the effect of
	leaving out the line where the match was found. (That the first
	search was backward and the second forward is not relevant. The
	point is that the address before the comma, whatever it is,
	receives the plus offset, while the address after the comma gets
	the minus offset.)

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