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How to implement this?

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# 8  
Old 10-20-2010
Thanks.. I was digging into that awk statement and how does it process each line.Wot i understood was..When line 1 get processed awk stores line 1 in memory as
Quote:
1,"A","B"
Now line 2..wher it gets stored as(RS in between)
Quote:
1,"A","B"
2,"C","D"
And the remaining lines.. alike..Pls tell how this stored in the reverse way in the memory.(i guess the trick is with RS- \n but not able to understand)
# 9  
Old 10-20-2010
It gets stored as 1,"A","B"\n after line 2, p contains: 2,"C","D"\n1,"A","B"\n

---------- Post updated at 12:36 ---------- Previous update was at 12:34 ----------

@Priyanka S, welcome to uni.com, but please don't piggyback on a thread. Start a new topic.

Moderator's Comments:
Mod Comment Thx Scrutinizer, I've already dealt with this
Last edited by bakunin; 10-20-2010 at 07:45 AM..
# 10  
Old 10-20-2010
MySQL
or alternative Smilie
Code:
# sed -e :a -e 'N;s/\(.*\)\n\(.*\)/\2\n\1/' -ne '$p;ta' file1

©ygemici - ®SED
# 11  
Old 10-20-2010
Code:
tail -r infile

# 12  
Old 10-20-2010
Code:
tail: invalid option -- 'r'
Try `tail --help' for more information.

# 13  
Old 10-20-2010
@Scru1Linizer

Yeah true

in any case, i am sure almost all (if not all) unix still have cat sort & cut Smilie

Code:
cat -n yourfile | sort -r -k 1 | cut -c8-


the tail -r works (at least) on SunOS (x86 and sparc)
yeah, tac is (at least) on linux

Code:
# tail -r tutu
tail: option invalide -- r
Pour en savoir davantage, faites: « tail --help ».
# tac tutu
4
3
2
1
toto
titi
tutu
# uname -a
Linux xxxxxxx 2.4.21-40.ELsmp #1 SMP Thu Feb 2 22:22:39 EST 2006 i686 i686 i386 GNU/Linux

Code:
# cat toto
tutu
titi
toto
1
2
3
4
# tail -r toto
4
3
2
1
toto
titi
tutu
# uname -a
SunOS xxxxx 5.10 Generic_141414-01 sun4u sparc SUNW,Sun-Fire-V490


Code:
# cat toto
tutu
titi
toto
1
2
3
4
# tail -r toto
4
3
2
1
toto
titi
tutu
# uname -a
SunOS xxxxxxxxx 5.10 Generic_142901-03 i86pc i386 i86pc
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