Question about linux: Stream edit (SED)... can someone help?

[WarDemon666]

Lets say i have this data:

123
1245
265
sgdfg
bla
4235
sdaf
sag
smdm
sklmdsf
kmsd
bla2

I want to move bla2 to where bla is, and bla where bla2 is...

if i use sed -e '/bla/h' -e '/bla2/x' DATAFILE it changes the last one to bla...

is there a way to exchange the two lines?

Thanks in advance!!

 

[WarDemon666]

anyone have any ideas?

 

[fs5]

are you doing it by line number or by text pattern?
line number swapping tutorial:
http://www.adp-gmbh.ch/unix/sed/ (bottom of the page).

 

[WarDemon666]

Originally posted by: fs5
are you doing it by line number or by text pattern?
line number swapping tutorial:
http://www.adp-gmbh.ch/unix/sed/ (bottom of the page).

I want text pattern...

has to find bla, then flip it with bla2... i dont know what line each one is on...

 

[WarDemon666]

^^^

 

[WarDemon666]

anyone?

 

[WarDemon666]

still kinda stuck

 

[WarDemon666]

someone must be able to help me!

 

[sao123]

use c++.... much easier.

 

[WarDemon666]

Originally posted by: sao123
use c++.... much easier.

im trying to get used to sed.. I know theres a way to do it....

somehow ill have to read it into a file and hold buffer also.... someone help!!

 

[urname7698]

try something like sed s/bla2/voovoo/g | sed s/bla/bla2/g | sed s/voovoo/bla/g

does that make sense?

 

[AnonymouseUser]

Ask the question here and you'll get an answer. In fact, sed is touched on here, a sticky in that sub-forum.

 

[fs5]

Originally posted by: sao123
use c++.... much easier.

for text processing such as this, sed is much faster for people that know how to use it. As for me, I never learned but should.

 

[randal]

I don't know a whole lot about sed, but I do know that you can grab the line numbers you are working on with `grep -n "text_to_find" file` ...

If you are looking for pairs, you could do this ...

grep -n "text_a" file >> output
grep -n "text_b" file >> output
cat output | cut -f1 -d: | sort -n

That will spit out the line numbers, in order, of things that match. If somebody has a line-switching script, then with a little coding you should be set.

 

[randal]

Originally posted by: urname7698
try something like sed s/bla2/voovoo/g | sed s/bla/bla2/g | sed s/voovoo/bla/g

does that make sense?

I took this on as a challenge for lunch, and came up with a terrible way to do it with awk, a not-working way to do it with perl, and the following sed script which works -- urname was right on.

sed -e 's/^bla$/something_else/g' -e 's/^bla2$/bla/g' -e 's/something_else/bla2/g' your_file

 

[WarDemon666]

Originally posted by: randal

Originally posted by: urname7698
try something like sed s/bla2/voovoo/g | sed s/bla/bla2/g | sed s/voovoo/bla/g

does that make sense?

I took this on as a challenge for lunch, and came up with a terrible way to do it with awk, a not-working way to do it with perl, and the following sed script which works -- urname was right on.

sed -e 's/^bla$/something_else/g' -e 's/^bla2$/bla/g' -e 's/something_else/bla2/g' your_file

I forgot to add something here. I want the whole line, and each line contains garbage, we dont know what each line has...

meaning, theres not ONLY bla on the line.... your ^bla$ represents only that on the line....

ideas to move the whole line?

 

[fs5]

Originally posted by: WarDemon666
I forgot to add something here. I want the whole line, and each line contains garbage, we dont know what each line has...

meaning, theres not ONLY bla on the line.... your ^bla$ represents only that on the line....

ideas to move the whole line?

it's as if WarDemon666 were sales and ATOT is engineering. "Oh by the way, I forgot to mention we wanted this feature also... not that it would have helped you if you knew the specs from the beginning" 😛

 

[WarDemon666]

Originally posted by: fs5

Originally posted by: WarDemon666
I forgot to add something here. I want the whole line, and each line contains garbage, we dont know what each line has...

meaning, theres not ONLY bla on the line.... your ^bla$ represents only that on the line....

ideas to move the whole line?

it's as if WarDemon666 were sales and ATOT is engineering. "Oh by the way, I forgot to mention we wanted this feature also... not that it would have helped you if you knew the specs from the beginning" 😛

lol.... sorry about that 😱

:thumbsup: