[unix-history] / usr / lib / learn / editor / L33.2a

#print
When you want to match one of a few specific characters,
and not anything, the pattern is similar to that used in
file names. That is,
  [abc]
matches the letters 'a', 'b', or 'c', but nothing
else.  Try this sequence and note what happens:

ed lines
1,$p
1s/[123]/9/
2s/[123]/9/
1,$p
w
q
ready
#create Ref
599
948
#create lines
519
348
#user
#cmp lines Ref
#log
#next
33.2b 5
Commit	Line	Data
fed84c9b TL	1	#print
	2	When you want to match one of a few specific characters,
	3	and not anything, the pattern is similar to that used in
	4	file names. That is,
	5	[abc]
	6	matches the letters 'a', 'b', or 'c', but nothing
	7	else. Try this sequence and note what happens:
	8
	9	ed lines
	10	1,$p
	11	1s/[123]/9/
	12	2s/[123]/9/
	13	1,$p
	14	w
	15	q
	16	ready
	17	#create Ref
	18	599
	19	948
	20	#create lines
	21	519
	22	348
	23	#user
	24	#cmp lines Ref
	25	#log
	26	#next
	27	33.2b 5