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Awk syntax, strange variable?
Compare the similar file and not similar files display below output in awk?Comparing two files using Unix and AwkComparing Files based on 5 fields using Awk and BashFinding out the common lines in two files using 4 fields using awk and UNIXMerging 2 files with based on field matchUsing awk to select column data from separate filesCompare two files with awkJoining two files matching two columns with mismatches and in each matching line, substitute second column from file 1 into 6th column in file 2compare two files and print matches - large filesawk manipulation of a file
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
I have this awk command:
awk -F, 'NR==FNR_1[$1]++;next_1[$1]' file1 file2
I actually almost know what the program is doing, but I don't know what _1 means. The intention is to compare two files, one has 1 field and the other has 4 fields.
Here's what I'm trying to do. I have these files, I need to know which numbers on file1 is in file 2 and then print the record of file 2.
file1
89611862
89613696
84126597
88690669
60147342
file2
84126597,12345300943529348333,2805058C30730000,28
88767631,12345712012010684248,2805058C30730002,28
83218719,12345712012012622594,2805058C30730006,28
89611862,12345712012010174449,2805058C30730014,28
85933710,12345712012007778032,2805058C3073001A,26
88690669,12345712012012060159,2805058C3073001E,28
60147342,12345712012011235922,2805058C30730030,28
89613696,12345712012008043980,2805058C3073003C,28
84783612,12345712012031117926,2805058C3073004C,28
awk -F, 'NR==FNRarr[$1]++;nextarr[$1]' file1 file2
But it only prints the last found record:
60147342,12345712012011235922,2805058C30730030,28
Thanks!
awk
edited 1 hour ago
Kusalananda♦
140k17261435
asked 2 hours ago
Chila MendezChila Mendez
83
New contributor
Chila Mendez is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I have this awk command:
awk -F, 'NR==FNR_1[$1]++;next_1[$1]' file1 file2
I actually almost know what the program is doing, but I don't know what _1 means. The intention is to compare two files, one has 1 field and the other has 4 fields.
Here's what I'm trying to do. I have these files, I need to know which numbers on file1 is in file 2 and then print the record of file 2.
file1
89611862
89613696
84126597
88690669
60147342
file2
84126597,12345300943529348333,2805058C30730000,28
88767631,12345712012010684248,2805058C30730002,28
83218719,12345712012012622594,2805058C30730006,28
89611862,12345712012010174449,2805058C30730014,28
85933710,12345712012007778032,2805058C3073001A,26
88690669,12345712012012060159,2805058C3073001E,28
60147342,12345712012011235922,2805058C30730030,28
89613696,12345712012008043980,2805058C3073003C,28
84783612,12345712012031117926,2805058C3073004C,28
awk -F, 'NR==FNRarr[$1]++;nextarr[$1]' file1 file2
But it only prints the last found record:
60147342,12345712012011235922,2805058C30730030,28
Thanks!
awk
edited 1 hour ago
Kusalananda♦
140k17261435
asked 2 hours ago
Chila MendezChila Mendez
83
New contributor
Chila Mendez is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
take care with the line terminators; some lines fromfile1may be terminated bycr/lf, windows-mode. Do you have the same problem if you replace-F,with-F'[,r]'?
– mosvy
1 hour ago
You are absolutely right!! I change it and it works, and yes, I have that problem with the file1. Thanks!!
– Chila Mendez
1 hour ago
add a comment |
I have this awk command:
awk -F, 'NR==FNR_1[$1]++;next_1[$1]' file1 file2
I actually almost know what the program is doing, but I don't know what _1 means. The intention is to compare two files, one has 1 field and the other has 4 fields.
Here's what I'm trying to do. I have these files, I need to know which numbers on file1 is in file 2 and then print the record of file 2.
file1
89611862
89613696
84126597
88690669
60147342
file2
84126597,12345300943529348333,2805058C30730000,28
88767631,12345712012010684248,2805058C30730002,28
83218719,12345712012012622594,2805058C30730006,28
89611862,12345712012010174449,2805058C30730014,28
85933710,12345712012007778032,2805058C3073001A,26
88690669,12345712012012060159,2805058C3073001E,28
60147342,12345712012011235922,2805058C30730030,28
89613696,12345712012008043980,2805058C3073003C,28
84783612,12345712012031117926,2805058C3073004C,28
awk -F, 'NR==FNRarr[$1]++;nextarr[$1]' file1 file2
But it only prints the last found record:
60147342,12345712012011235922,2805058C30730030,28
Thanks!
awk
edited 1 hour ago
Kusalananda♦
140k17261435
asked 2 hours ago
Chila MendezChila Mendez
83
New contributor
Chila Mendez is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I have this awk command:
awk -F, 'NR==FNR_1[$1]++;next_1[$1]' file1 file2
I actually almost know what the program is doing, but I don't know what _1 means. The intention is to compare two files, one has 1 field and the other has 4 fields.
Here's what I'm trying to do. I have these files, I need to know which numbers on file1 is in file 2 and then print the record of file 2.
file1
89611862
89613696
84126597
88690669
60147342
file2
84126597,12345300943529348333,2805058C30730000,28
88767631,12345712012010684248,2805058C30730002,28
83218719,12345712012012622594,2805058C30730006,28
89611862,12345712012010174449,2805058C30730014,28
85933710,12345712012007778032,2805058C3073001A,26
88690669,12345712012012060159,2805058C3073001E,28
60147342,12345712012011235922,2805058C30730030,28
89613696,12345712012008043980,2805058C3073003C,28
84783612,12345712012031117926,2805058C3073004C,28
awk -F, 'NR==FNRarr[$1]++;nextarr[$1]' file1 file2
But it only prints the last found record:
60147342,12345712012011235922,2805058C30730030,28
Thanks!
awk
awk
edited 1 hour ago
Kusalananda♦
140k17261435
asked 2 hours ago
Chila MendezChila Mendez
83
New contributor
Chila Mendez is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 1 hour ago
Kusalananda♦
140k17261435
asked 2 hours ago
Chila MendezChila Mendez
83
New contributor
Chila Mendez is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 1 hour ago
Kusalananda♦
140k17261435
edited 1 hour ago
Kusalananda♦
140k17261435
edited 1 hour ago
Kusalananda♦
140k17261435
140k17261435
asked 2 hours ago
Chila MendezChila Mendez
83
New contributor
Chila Mendez is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 hours ago
Chila MendezChila Mendez
83
asked 2 hours ago
Chila MendezChila Mendez
83
83
New contributor
Chila Mendez is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Chila Mendez is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Chila Mendez is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
take care with the line terminators; some lines fromfile1may be terminated bycr/lf, windows-mode. Do you have the same problem if you replace-F,with-F'[,r]'?
– mosvy
1 hour ago
You are absolutely right!! I change it and it works, and yes, I have that problem with the file1. Thanks!!
– Chila Mendez
1 hour ago
add a comment |
take care with the line terminators; some lines fromfile1may be terminated bycr/lf, windows-mode. Do you have the same problem if you replace-F,with-F'[,r]'?
– mosvy
1 hour ago
You are absolutely right!! I change it and it works, and yes, I have that problem with the file1. Thanks!!
– Chila Mendez
1 hour ago
take care with the line terminators; some lines from
file1 may be terminated by cr/lf, windows-mode. Do you have the same problem if you replace -F, with -F'[,r]'?– mosvy
1 hour ago
take care with the line terminators; some lines from
file1 may be terminated by cr/lf, windows-mode. Do you have the same problem if you replace -F, with -F'[,r]'?– mosvy
1 hour ago
You are absolutely right!! I change it and it works, and yes, I have that problem with the file1. Thanks!!
– Chila Mendez
1 hour ago
You are absolutely right!! I change it and it works, and yes, I have that problem with the file1. Thanks!!
– Chila Mendez
1 hour ago
add a comment |
1 Answer
1
active
oldest
votes
awk does not allow digit-only variable names (and variable names can't begin with a digit as well), so _1 is a trick to prepend _ in front of 1; so, _1 is a variable name in your awk program, which happens to be an array in this case.
Here is an example:
% awk 'BEGIN 1 = 3'
awk: cmd. line:1: BEGIN 1 = 3
awk: cmd. line:1: ^ syntax error
% awk 'BEGIN _1 = 3' # runs fine
As an aside, you should use readable variable names in your program to have better maintainability unless you're golfing intentionally.
answered 2 hours ago
heemaylheemayl
36.2k378108
add a comment |
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awk does not allow digit-only variable names (and variable names can't begin with a digit as well), so _1 is a trick to prepend _ in front of 1; so, _1 is a variable name in your awk program, which happens to be an array in this case.
Here is an example:
% awk 'BEGIN 1 = 3'
awk: cmd. line:1: BEGIN 1 = 3
awk: cmd. line:1: ^ syntax error
% awk 'BEGIN _1 = 3' # runs fine
As an aside, you should use readable variable names in your program to have better maintainability unless you're golfing intentionally.
answered 2 hours ago
heemaylheemayl
36.2k378108
add a comment |
awk does not allow digit-only variable names (and variable names can't begin with a digit as well), so _1 is a trick to prepend _ in front of 1; so, _1 is a variable name in your awk program, which happens to be an array in this case.
Here is an example:
% awk 'BEGIN 1 = 3'
awk: cmd. line:1: BEGIN 1 = 3
awk: cmd. line:1: ^ syntax error
% awk 'BEGIN _1 = 3' # runs fine
As an aside, you should use readable variable names in your program to have better maintainability unless you're golfing intentionally.
answered 2 hours ago
heemaylheemayl
36.2k378108
add a comment |
awk does not allow digit-only variable names (and variable names can't begin with a digit as well), so _1 is a trick to prepend _ in front of 1; so, _1 is a variable name in your awk program, which happens to be an array in this case.
Here is an example:
% awk 'BEGIN 1 = 3'
awk: cmd. line:1: BEGIN 1 = 3
awk: cmd. line:1: ^ syntax error
% awk 'BEGIN _1 = 3' # runs fine
As an aside, you should use readable variable names in your program to have better maintainability unless you're golfing intentionally.
answered 2 hours ago
heemaylheemayl
36.2k378108
awk does not allow digit-only variable names (and variable names can't begin with a digit as well), so _1 is a trick to prepend _ in front of 1; so, _1 is a variable name in your awk program, which happens to be an array in this case.
Here is an example:
% awk 'BEGIN 1 = 3'
awk: cmd. line:1: BEGIN 1 = 3
awk: cmd. line:1: ^ syntax error
% awk 'BEGIN _1 = 3' # runs fine
As an aside, you should use readable variable names in your program to have better maintainability unless you're golfing intentionally.
answered 2 hours ago
heemaylheemayl
36.2k378108
answered 2 hours ago
heemaylheemayl
36.2k378108
answered 2 hours ago
heemaylheemayl
36.2k378108
answered 2 hours ago
heemaylheemayl
36.2k378108
36.2k378108
add a comment |
add a comment |
Chila Mendez is a new contributor. Be nice, and check out our Code of Conduct.
Chila Mendez is a new contributor. Be nice, and check out our Code of Conduct.
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take care with the line terminators; some lines from
file1may be terminated bycr/lf, windows-mode. Do you have the same problem if you replace-F,with-F'[,r]'?– mosvy
1 hour ago
You are absolutely right!! I change it and it works, and yes, I have that problem with the file1. Thanks!!
– Chila Mendez
1 hour ago