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
Doomsday-clock for my fantasy planet
Patience, young "Padovan"
How to answer pointed "are you quitting" questioning when I don't want them to suspect
When blogging recipes, how can I support both readers who want the narrative/journey and ones who want the printer-friendly recipe?
Piano - What is the notation for a double stop where both notes in the double stop are different lengths?
Are white and non-white police officers equally likely to kill black suspects?
How to manage monthly salary
Need help identifying/translating a plaque in Tangier, Morocco
Eliminate empty elements from a list with a specific pattern
Are objects structures and/or vice versa?
Can I find out the caloric content of bread by dehydrating it?
Symmetry in quantum mechanics
Shall I use personal or official e-mail account when registering to external websites for work purpose?
Information to fellow intern about hiring?
How did the USSR manage to innovate in an environment characterized by government censorship and high bureaucracy?
Is this food a bread or a loaf?
What do you call something that goes against the spirit of the law, but is legal when interpreting the law to the letter?
Does the average primeness of natural numbers tend to zero?
Landlord wants to switch my lease to a "Land contract" to "get back at the city"
Manga about a female worker who got dragged into another world together with this high school girl and she was just told she's not needed anymore
Finding files for which a command fails
What is GPS' 19 year rollover and does it present a cybersecurity issue?
Can produce flame be used to grapple, or as an unarmed strike, in the right circumstances?
Could a US political party gain complete control over the government by removing checks & balances?
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 yesterday
Kusalananda♦
140k17261435
asked yesterday
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 yesterday
Kusalananda♦
140k17261435
asked yesterday
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
yesterday
You are absolutely right!! I change it and it works, and yes, I have that problem with the file1. Thanks!!
– Chila Mendez
yesterday
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 yesterday
Kusalananda♦
140k17261435
asked yesterday
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 yesterday
Kusalananda♦
140k17261435
asked yesterday
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 yesterday
Kusalananda♦
140k17261435
asked yesterday
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 yesterday
Kusalananda♦
140k17261435
edited yesterday
Kusalananda♦
140k17261435
edited yesterday
Kusalananda♦
140k17261435
140k17261435
asked yesterday
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 yesterday
Chila MendezChila Mendez
83
asked yesterday
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
yesterday
You are absolutely right!! I change it and it works, and yes, I have that problem with the file1. Thanks!!
– Chila Mendez
yesterday
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
yesterday
You are absolutely right!! I change it and it works, and yes, I have that problem with the file1. Thanks!!
– Chila Mendez
yesterday
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
yesterday
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
yesterday
You are absolutely right!! I change it and it works, and yes, I have that problem with the file1. Thanks!!
– Chila Mendez
yesterday
You are absolutely right!! I change it and it works, and yes, I have that problem with the file1. Thanks!!
– Chila Mendez
yesterday
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 yesterday
heemaylheemayl
36.2k378108
add a comment |
Your Answer
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "106"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);
else
createEditor();
);
function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);
);
Chila Mendez is a new contributor. Be nice, and check out our Code of Conduct.
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f511093%2fawk-syntax-strange-variable%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
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 yesterday
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 yesterday
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 yesterday
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 yesterday
heemaylheemayl
36.2k378108
answered yesterday
heemaylheemayl
36.2k378108
answered yesterday
heemaylheemayl
36.2k378108
answered yesterday
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.
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.
Thanks for contributing an answer to Unix & Linux Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f511093%2fawk-syntax-strange-variable%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
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
yesterday
You are absolutely right!! I change it and it works, and yes, I have that problem with the file1. Thanks!!
– Chila Mendez
yesterday