Bash Script for showing difference between two text files
Clash Royale CLAN TAG#URR8PPP
up vote
4
down vote
favorite
Lets say I have two lists:
guests-2016.txt:
Peter
Michael
Frank
Dirk
guests-2017.txt:
Mark
Michael
Dirk
Lilly
How may I create two new lists of guests
Guests that were in
guests-2016.txtbut are not inguests-2017.txt(former_guests.txt)Guests that were not in
guests-2016.txtbut are inguests-2017.txtnow (new_guests.txt)
Blank lines should be ignored. Only standard utilities should be used.
My idea would be to use diff and do some post processing.
shell-script text-processing scripting diff
edited Sep 26 '17 at 20:23
Jeff Schaller
32.3k849110
asked Sep 26 '17 at 19:07
NoobieNoob
232
add a comment |Â
up vote
4
down vote
favorite
Lets say I have two lists:
guests-2016.txt:
Peter
Michael
Frank
Dirk
guests-2017.txt:
Mark
Michael
Dirk
Lilly
How may I create two new lists of guests
Guests that were in
guests-2016.txtbut are not inguests-2017.txt(former_guests.txt)Guests that were not in
guests-2016.txtbut are inguests-2017.txtnow (new_guests.txt)
Blank lines should be ignored. Only standard utilities should be used.
My idea would be to use diff and do some post processing.
shell-script text-processing scripting diff
edited Sep 26 '17 at 20:23
Jeff Schaller
32.3k849110
asked Sep 26 '17 at 19:07
NoobieNoob
232
6
Check out the manual page forcomm. Then add what you have tried, and explain how it did not work as you intended.
– DopeGhoti
Sep 26 '17 at 19:09
add a comment |Â
up vote
4
down vote
favorite
up vote
4
down vote
favorite
Lets say I have two lists:
guests-2016.txt:
Peter
Michael
Frank
Dirk
guests-2017.txt:
Mark
Michael
Dirk
Lilly
How may I create two new lists of guests
Guests that were in
guests-2016.txtbut are not inguests-2017.txt(former_guests.txt)Guests that were not in
guests-2016.txtbut are inguests-2017.txtnow (new_guests.txt)
Blank lines should be ignored. Only standard utilities should be used.
My idea would be to use diff and do some post processing.
shell-script text-processing scripting diff
edited Sep 26 '17 at 20:23
Jeff Schaller
32.3k849110
asked Sep 26 '17 at 19:07
NoobieNoob
232
Lets say I have two lists:
guests-2016.txt:
Peter
Michael
Frank
Dirk
guests-2017.txt:
Mark
Michael
Dirk
Lilly
How may I create two new lists of guests
Guests that were in
guests-2016.txtbut are not inguests-2017.txt(former_guests.txt)Guests that were not in
guests-2016.txtbut are inguests-2017.txtnow (new_guests.txt)
Blank lines should be ignored. Only standard utilities should be used.
My idea would be to use diff and do some post processing.
shell-script text-processing scripting diff
shell-script text-processing scripting diff
edited Sep 26 '17 at 20:23
Jeff Schaller
32.3k849110
asked Sep 26 '17 at 19:07
NoobieNoob
232
edited Sep 26 '17 at 20:23
Jeff Schaller
32.3k849110
asked Sep 26 '17 at 19:07
NoobieNoob
232
edited Sep 26 '17 at 20:23
Jeff Schaller
32.3k849110
edited Sep 26 '17 at 20:23
Jeff Schaller
32.3k849110
edited Sep 26 '17 at 20:23
Jeff Schaller
32.3k849110
32.3k849110
asked Sep 26 '17 at 19:07
NoobieNoob
232
asked Sep 26 '17 at 19:07
NoobieNoob
232
asked Sep 26 '17 at 19:07
NoobieNoob
232
232
6
Check out the manual page forcomm. Then add what you have tried, and explain how it did not work as you intended.
– DopeGhoti
Sep 26 '17 at 19:09
add a comment |Â
6
Check out the manual page forcomm. Then add what you have tried, and explain how it did not work as you intended.
– DopeGhoti
Sep 26 '17 at 19:09
6
6
Check out the manual page for
comm. Then add what you have tried, and explain how it did not work as you intended.– DopeGhoti
Sep 26 '17 at 19:09
Check out the manual page for
comm. Then add what you have tried, and explain how it did not work as you intended.– DopeGhoti
Sep 26 '17 at 19:09
add a comment |Â
2 Answers
2
active
oldest
votes
up vote
3
down vote
accepted
Given two sorted files, comm would do this for you.
See the combinations of the -2 -3 and -1 -3 command line options, for example.
answered Sep 26 '17 at 19:25
Kusalananda
106k14209327
Thanks I did not know comm before. How to skip blank lines?
– NoobieNoob
Sep 26 '17 at 19:32
@NoobieNoob There are no blank lines in you example data, nor will there be any in the output fromcomm.
– Kusalananda
Sep 26 '17 at 19:41
add a comment |Â
up vote
1
down vote
Check, does it do the job. I can add an explanation, if you are needed.
awk '
/^$/next
FNR == NR guest_2016[$1] = 1
FNR != NR
if(!guest_2016[$1])
print $1 > "new_guests.txt"
delete guest_2016[$1];
END
for(i in guest_2016)
print i > "former_guests.txt"
' guests-2016.txt guests-2017.txt
answered Sep 26 '17 at 20:41
MiniMax
2,706719
add a comment |Â
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
3
down vote
accepted
Given two sorted files, comm would do this for you.
See the combinations of the -2 -3 and -1 -3 command line options, for example.
answered Sep 26 '17 at 19:25
Kusalananda
106k14209327
Thanks I did not know comm before. How to skip blank lines?
– NoobieNoob
Sep 26 '17 at 19:32
@NoobieNoob There are no blank lines in you example data, nor will there be any in the output fromcomm.
– Kusalananda
Sep 26 '17 at 19:41
add a comment |Â
up vote
3
down vote
accepted
Given two sorted files, comm would do this for you.
See the combinations of the -2 -3 and -1 -3 command line options, for example.
answered Sep 26 '17 at 19:25
Kusalananda
106k14209327
Thanks I did not know comm before. How to skip blank lines?
– NoobieNoob
Sep 26 '17 at 19:32
@NoobieNoob There are no blank lines in you example data, nor will there be any in the output fromcomm.
– Kusalananda
Sep 26 '17 at 19:41
add a comment |Â
up vote
3
down vote
accepted
up vote
3
down vote
accepted
Given two sorted files, comm would do this for you.
See the combinations of the -2 -3 and -1 -3 command line options, for example.
answered Sep 26 '17 at 19:25
Kusalananda
106k14209327
Given two sorted files, comm would do this for you.
See the combinations of the -2 -3 and -1 -3 command line options, for example.
answered Sep 26 '17 at 19:25
Kusalananda
106k14209327
answered Sep 26 '17 at 19:25
Kusalananda
106k14209327
answered Sep 26 '17 at 19:25
Kusalananda
106k14209327
answered Sep 26 '17 at 19:25
Kusalananda
106k14209327
106k14209327
Thanks I did not know comm before. How to skip blank lines?
– NoobieNoob
Sep 26 '17 at 19:32
@NoobieNoob There are no blank lines in you example data, nor will there be any in the output fromcomm.
– Kusalananda
Sep 26 '17 at 19:41
add a comment |Â
Thanks I did not know comm before. How to skip blank lines?
– NoobieNoob
Sep 26 '17 at 19:32
@NoobieNoob There are no blank lines in you example data, nor will there be any in the output fromcomm.
– Kusalananda
Sep 26 '17 at 19:41
Thanks I did not know comm before. How to skip blank lines?
– NoobieNoob
Sep 26 '17 at 19:32
Thanks I did not know comm before. How to skip blank lines?
– NoobieNoob
Sep 26 '17 at 19:32
@NoobieNoob There are no blank lines in you example data, nor will there be any in the output from
comm.– Kusalananda
Sep 26 '17 at 19:41
@NoobieNoob There are no blank lines in you example data, nor will there be any in the output from
comm.– Kusalananda
Sep 26 '17 at 19:41
add a comment |Â
up vote
1
down vote
Check, does it do the job. I can add an explanation, if you are needed.
awk '
/^$/next
FNR == NR guest_2016[$1] = 1
FNR != NR
if(!guest_2016[$1])
print $1 > "new_guests.txt"
delete guest_2016[$1];
END
for(i in guest_2016)
print i > "former_guests.txt"
' guests-2016.txt guests-2017.txt
answered Sep 26 '17 at 20:41
MiniMax
2,706719
add a comment |Â
up vote
1
down vote
Check, does it do the job. I can add an explanation, if you are needed.
awk '
/^$/next
FNR == NR guest_2016[$1] = 1
FNR != NR
if(!guest_2016[$1])
print $1 > "new_guests.txt"
delete guest_2016[$1];
END
for(i in guest_2016)
print i > "former_guests.txt"
' guests-2016.txt guests-2017.txt
answered Sep 26 '17 at 20:41
MiniMax
2,706719
add a comment |Â
up vote
1
down vote
up vote
1
down vote
Check, does it do the job. I can add an explanation, if you are needed.
awk '
/^$/next
FNR == NR guest_2016[$1] = 1
FNR != NR
if(!guest_2016[$1])
print $1 > "new_guests.txt"
delete guest_2016[$1];
END
for(i in guest_2016)
print i > "former_guests.txt"
' guests-2016.txt guests-2017.txt
answered Sep 26 '17 at 20:41
MiniMax
2,706719
Check, does it do the job. I can add an explanation, if you are needed.
awk '
/^$/next
FNR == NR guest_2016[$1] = 1
FNR != NR
if(!guest_2016[$1])
print $1 > "new_guests.txt"
delete guest_2016[$1];
END
for(i in guest_2016)
print i > "former_guests.txt"
' guests-2016.txt guests-2017.txt
answered Sep 26 '17 at 20:41
MiniMax
2,706719
answered Sep 26 '17 at 20:41
MiniMax
2,706719
answered Sep 26 '17 at 20:41
MiniMax
2,706719
answered Sep 26 '17 at 20:41
MiniMax
2,706719
2,706719
add a comment |Â
add a comment |Â
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6
Check out the manual page for
comm. Then add what you have tried, and explain how it did not work as you intended.– DopeGhoti
Sep 26 '17 at 19:09