[unix-history] / usr / lib / learn / files / L7.3a

#print
Sometimes ? is too flexible, and you
only want to allow a few characters.  For example,
you might want to abbreviate
  ls memo.ab memo.ac
without picking up "memo.ad", "!"memo.ae", and so forth.
You can match one of a set of particular characters by 
putting them in brackets "[]" in the list you use with "ls".
For example,
  [bc]
matches either b or c but no other letters.
Thus the command
  ls memo.a[bc]
would match "memo.ab", "memo.ac", and nothing else.
Try that command in this directory: type a plain
"ls" first, and then "ls memo.a[bc]".
How many files does "ls memo.a[bc]" match?
Type "answer N" where N is the number.
#create memo.ab
#create memo.abc
#create memo.bc
#copyin
#user
#uncopyin
#match 1
#log
#next
7.3b 2
Commit	Line	Data
fed84c9b TL	1	#print
	2	Sometimes ? is too flexible, and you
	3	only want to allow a few characters. For example,
	4	you might want to abbreviate
	5	ls memo.ab memo.ac
	6	without picking up "memo.ad", "!"memo.ae", and so forth.
	7	You can match one of a set of particular characters by
	8	putting them in brackets "[]" in the list you use with "ls".
	9	For example,
	10	[bc]
	11	matches either b or c but no other letters.
	12	Thus the command
	13	ls memo.a[bc]
	14	would match "memo.ab", "memo.ac", and nothing else.
	15	Try that command in this directory: type a plain
	16	"ls" first, and then "ls memo.a[bc]".
	17	How many files does "ls memo.a[bc]" match?
	18	Type "answer N" where N is the number.
	19	#create memo.ab
	20	#create memo.abc
	21	#create memo.bc
	22	#copyin
	23	#user
	24	#uncopyin
	25	#match 1
	26	#log
	27	#next
	28	7.3b 2