Save the matches of grep as an array
I have a file with the following contents:
FILETYPE=A:B:C:D
How can I grep out A, B, C and D and save them as an array in a ksh script on Linux? I tried
FILETYPES=`grep "FILETYPE" ${CONF_FILE} | awk -F: '{print $NF}'`
But that only gets the last one.
grep
edited 1 hour ago
Sparhawk
10.2k74398
asked Jun 15 '16 at 8:36
user548682user548682
3225
add a comment |
I have a file with the following contents:
FILETYPE=A:B:C:D
How can I grep out A, B, C and D and save them as an array in a ksh script on Linux? I tried
FILETYPES=`grep "FILETYPE" ${CONF_FILE} | awk -F: '{print $NF}'`
But that only gets the last one.
grep
edited 1 hour ago
Sparhawk
10.2k74398
asked Jun 15 '16 at 8:36
user548682user548682
3225
im using shel ksh
– user548682
Jun 15 '16 at 8:40
What OS are you using? Is it Linux or something else?
– terdon♦
Jun 15 '16 at 8:40
Linux, ksh script.
– user548682
Jun 15 '16 at 8:41
add a comment |
I have a file with the following contents:
FILETYPE=A:B:C:D
How can I grep out A, B, C and D and save them as an array in a ksh script on Linux? I tried
FILETYPES=`grep "FILETYPE" ${CONF_FILE} | awk -F: '{print $NF}'`
But that only gets the last one.
grep
edited 1 hour ago
Sparhawk
10.2k74398
asked Jun 15 '16 at 8:36
user548682user548682
3225
I have a file with the following contents:
FILETYPE=A:B:C:D
How can I grep out A, B, C and D and save them as an array in a ksh script on Linux? I tried
FILETYPES=`grep "FILETYPE" ${CONF_FILE} | awk -F: '{print $NF}'`
But that only gets the last one.
grep
grep
edited 1 hour ago
Sparhawk
10.2k74398
asked Jun 15 '16 at 8:36
user548682user548682
3225
edited 1 hour ago
Sparhawk
10.2k74398
asked Jun 15 '16 at 8:36
user548682user548682
3225
edited 1 hour ago
Sparhawk
10.2k74398
edited 1 hour ago
Sparhawk
10.2k74398
edited 1 hour ago
Sparhawk
10.2k74398
10.2k74398
asked Jun 15 '16 at 8:36
user548682user548682
3225
asked Jun 15 '16 at 8:36
user548682user548682
3225
asked Jun 15 '16 at 8:36
user548682user548682
3225
3225
im using shel ksh
– user548682
Jun 15 '16 at 8:40
What OS are you using? Is it Linux or something else?
– terdon♦
Jun 15 '16 at 8:40
Linux, ksh script.
– user548682
Jun 15 '16 at 8:41
add a comment |
im using shel ksh
– user548682
Jun 15 '16 at 8:40
What OS are you using? Is it Linux or something else?
– terdon♦
Jun 15 '16 at 8:40
Linux, ksh script.
– user548682
Jun 15 '16 at 8:41
im using shel ksh
– user548682
Jun 15 '16 at 8:40
im using shel ksh
– user548682
Jun 15 '16 at 8:40
What OS are you using? Is it Linux or something else?
– terdon♦
Jun 15 '16 at 8:40
What OS are you using? Is it Linux or something else?
– terdon♦
Jun 15 '16 at 8:40
Linux, ksh script.
– user548682
Jun 15 '16 at 8:41
Linux, ksh script.
– user548682
Jun 15 '16 at 8:41
add a comment |
2 Answers
2
active
oldest
votes
On Linux you can do:
filetypes=( $(grep -Po 'FILETYPE=K.*' ${CONF_FILE} | tr ':' ' ') )
Or, more idiomatically:
IFS=":" filetypes=( $(grep -Po 'GPGDIRLIST=K.*' file))
Note that I used lower case letters for the array name, that's usually safer since environmental variables are usually capitalized. The way to save the output of a command as an array is:
array=( `command` )
or
array=( $( command) )
Then, the command itself is grep with Perl Compatible Regular Expressions (-P), these give us K which means "discard anything matched up to this point. The -o causes grep to only print the matched portion of the line and, combined with the K, makes it only print A:B:C:D here. Finally, the tr replaces the : with spaces which allows the shell to interpret the result as an array:
$ echo ${filetypes[0]}
A
$ echo ${filetypes[3]}
D
answered Jun 15 '16 at 8:48
terdon♦terdon
131k32258437
I failed to save it as array. Is it ok to give a direct answer?
– user548682
Jun 15 '16 at 8:59
@user548682 I don't understand. If you want to post your own answer, yes, it is perfectly OK. I don't see why this would have failed though.
– terdon♦
Jun 15 '16 at 9:01
GPGDIRLISTS=(( $(grep -Po 'GPGDIRLIST=K.*' ${CONF_FILE} | tr ':' ' ') ))
– user548682
Jun 15 '16 at 9:07
Wonder why it failed.I used for loop like this, but it couldnt treat it as array. It still list out all items inside. for GPGDIRLIST in $GPGDIRLISTS
– user548682
Jun 15 '16 at 9:09
@user548682 because you added an extra set of parentheses. TryGPGDIRLISTS=( $(grep -Po 'GPGDIRLIST=K.*' ${CONF_FILE} | tr ':' ' ') ).
– terdon♦
Jun 15 '16 at 9:11
|
show 8 more comments
Short answer:
array=( `grep -Po '(?<=FILETYPE=).*$' $CONFIG_FILE | tr ':' ' '` )
Explanation: grep uses a "look behind" assertion to return whatever follows "FILETYPE=".
It'll end up declaring the array as:
array=(A B C D)
Then test:
echo "${array[0]} ${array[1]} ${array[2]} ${array[3]}"
Prints:
A B C D
answered Jun 15 '16 at 17:10
Bruno Negrão ZicaBruno Negrão Zica
1514
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
On Linux you can do:
filetypes=( $(grep -Po 'FILETYPE=K.*' ${CONF_FILE} | tr ':' ' ') )
Or, more idiomatically:
IFS=":" filetypes=( $(grep -Po 'GPGDIRLIST=K.*' file))
Note that I used lower case letters for the array name, that's usually safer since environmental variables are usually capitalized. The way to save the output of a command as an array is:
array=( `command` )
or
array=( $( command) )
Then, the command itself is grep with Perl Compatible Regular Expressions (-P), these give us K which means "discard anything matched up to this point. The -o causes grep to only print the matched portion of the line and, combined with the K, makes it only print A:B:C:D here. Finally, the tr replaces the : with spaces which allows the shell to interpret the result as an array:
$ echo ${filetypes[0]}
A
$ echo ${filetypes[3]}
D
answered Jun 15 '16 at 8:48
terdon♦terdon
131k32258437
I failed to save it as array. Is it ok to give a direct answer?
– user548682
Jun 15 '16 at 8:59
@user548682 I don't understand. If you want to post your own answer, yes, it is perfectly OK. I don't see why this would have failed though.
– terdon♦
Jun 15 '16 at 9:01
GPGDIRLISTS=(( $(grep -Po 'GPGDIRLIST=K.*' ${CONF_FILE} | tr ':' ' ') ))
– user548682
Jun 15 '16 at 9:07
Wonder why it failed.I used for loop like this, but it couldnt treat it as array. It still list out all items inside. for GPGDIRLIST in $GPGDIRLISTS
– user548682
Jun 15 '16 at 9:09
@user548682 because you added an extra set of parentheses. TryGPGDIRLISTS=( $(grep -Po 'GPGDIRLIST=K.*' ${CONF_FILE} | tr ':' ' ') ).
– terdon♦
Jun 15 '16 at 9:11
|
show 8 more comments
On Linux you can do:
filetypes=( $(grep -Po 'FILETYPE=K.*' ${CONF_FILE} | tr ':' ' ') )
Or, more idiomatically:
IFS=":" filetypes=( $(grep -Po 'GPGDIRLIST=K.*' file))
Note that I used lower case letters for the array name, that's usually safer since environmental variables are usually capitalized. The way to save the output of a command as an array is:
array=( `command` )
or
array=( $( command) )
Then, the command itself is grep with Perl Compatible Regular Expressions (-P), these give us K which means "discard anything matched up to this point. The -o causes grep to only print the matched portion of the line and, combined with the K, makes it only print A:B:C:D here. Finally, the tr replaces the : with spaces which allows the shell to interpret the result as an array:
$ echo ${filetypes[0]}
A
$ echo ${filetypes[3]}
D
answered Jun 15 '16 at 8:48
terdon♦terdon
131k32258437
I failed to save it as array. Is it ok to give a direct answer?
– user548682
Jun 15 '16 at 8:59
@user548682 I don't understand. If you want to post your own answer, yes, it is perfectly OK. I don't see why this would have failed though.
– terdon♦
Jun 15 '16 at 9:01
GPGDIRLISTS=(( $(grep -Po 'GPGDIRLIST=K.*' ${CONF_FILE} | tr ':' ' ') ))
– user548682
Jun 15 '16 at 9:07
Wonder why it failed.I used for loop like this, but it couldnt treat it as array. It still list out all items inside. for GPGDIRLIST in $GPGDIRLISTS
– user548682
Jun 15 '16 at 9:09
@user548682 because you added an extra set of parentheses. TryGPGDIRLISTS=( $(grep -Po 'GPGDIRLIST=K.*' ${CONF_FILE} | tr ':' ' ') ).
– terdon♦
Jun 15 '16 at 9:11
|
show 8 more comments
On Linux you can do:
filetypes=( $(grep -Po 'FILETYPE=K.*' ${CONF_FILE} | tr ':' ' ') )
Or, more idiomatically:
IFS=":" filetypes=( $(grep -Po 'GPGDIRLIST=K.*' file))
Note that I used lower case letters for the array name, that's usually safer since environmental variables are usually capitalized. The way to save the output of a command as an array is:
array=( `command` )
or
array=( $( command) )
Then, the command itself is grep with Perl Compatible Regular Expressions (-P), these give us K which means "discard anything matched up to this point. The -o causes grep to only print the matched portion of the line and, combined with the K, makes it only print A:B:C:D here. Finally, the tr replaces the : with spaces which allows the shell to interpret the result as an array:
$ echo ${filetypes[0]}
A
$ echo ${filetypes[3]}
D
answered Jun 15 '16 at 8:48
terdon♦terdon
131k32258437
On Linux you can do:
filetypes=( $(grep -Po 'FILETYPE=K.*' ${CONF_FILE} | tr ':' ' ') )
Or, more idiomatically:
IFS=":" filetypes=( $(grep -Po 'GPGDIRLIST=K.*' file))
Note that I used lower case letters for the array name, that's usually safer since environmental variables are usually capitalized. The way to save the output of a command as an array is:
array=( `command` )
or
array=( $( command) )
Then, the command itself is grep with Perl Compatible Regular Expressions (-P), these give us K which means "discard anything matched up to this point. The -o causes grep to only print the matched portion of the line and, combined with the K, makes it only print A:B:C:D here. Finally, the tr replaces the : with spaces which allows the shell to interpret the result as an array:
$ echo ${filetypes[0]}
A
$ echo ${filetypes[3]}
D
answered Jun 15 '16 at 8:48
terdon♦terdon
131k32258437
edited Jun 15 '16 at 15:27
answered Jun 15 '16 at 8:48
terdon♦terdon
131k32258437
answered Jun 15 '16 at 8:48
terdon♦terdon
131k32258437
answered Jun 15 '16 at 8:48
terdon♦terdon
131k32258437
131k32258437
I failed to save it as array. Is it ok to give a direct answer?
– user548682
Jun 15 '16 at 8:59
@user548682 I don't understand. If you want to post your own answer, yes, it is perfectly OK. I don't see why this would have failed though.
– terdon♦
Jun 15 '16 at 9:01
GPGDIRLISTS=(( $(grep -Po 'GPGDIRLIST=K.*' ${CONF_FILE} | tr ':' ' ') ))
– user548682
Jun 15 '16 at 9:07
Wonder why it failed.I used for loop like this, but it couldnt treat it as array. It still list out all items inside. for GPGDIRLIST in $GPGDIRLISTS
– user548682
Jun 15 '16 at 9:09
@user548682 because you added an extra set of parentheses. TryGPGDIRLISTS=( $(grep -Po 'GPGDIRLIST=K.*' ${CONF_FILE} | tr ':' ' ') ).
– terdon♦
Jun 15 '16 at 9:11
|
show 8 more comments
I failed to save it as array. Is it ok to give a direct answer?
– user548682
Jun 15 '16 at 8:59
@user548682 I don't understand. If you want to post your own answer, yes, it is perfectly OK. I don't see why this would have failed though.
– terdon♦
Jun 15 '16 at 9:01
GPGDIRLISTS=(( $(grep -Po 'GPGDIRLIST=K.*' ${CONF_FILE} | tr ':' ' ') ))
– user548682
Jun 15 '16 at 9:07
Wonder why it failed.I used for loop like this, but it couldnt treat it as array. It still list out all items inside. for GPGDIRLIST in $GPGDIRLISTS
– user548682
Jun 15 '16 at 9:09
@user548682 because you added an extra set of parentheses. TryGPGDIRLISTS=( $(grep -Po 'GPGDIRLIST=K.*' ${CONF_FILE} | tr ':' ' ') ).
– terdon♦
Jun 15 '16 at 9:11
I failed to save it as array. Is it ok to give a direct answer?
– user548682
Jun 15 '16 at 8:59
I failed to save it as array. Is it ok to give a direct answer?
– user548682
Jun 15 '16 at 8:59
@user548682 I don't understand. If you want to post your own answer, yes, it is perfectly OK. I don't see why this would have failed though.
– terdon♦
Jun 15 '16 at 9:01
@user548682 I don't understand. If you want to post your own answer, yes, it is perfectly OK. I don't see why this would have failed though.
– terdon♦
Jun 15 '16 at 9:01
GPGDIRLISTS=(
( $(grep -Po 'GPGDIRLIST=K.*' ${CONF_FILE} | tr ':' ' ') ) )– user548682
Jun 15 '16 at 9:07
GPGDIRLISTS=(
( $(grep -Po 'GPGDIRLIST=K.*' ${CONF_FILE} | tr ':' ' ') ) )– user548682
Jun 15 '16 at 9:07
Wonder why it failed.I used for loop like this, but it couldnt treat it as array. It still list out all items inside. for GPGDIRLIST in $GPGDIRLISTS
– user548682
Jun 15 '16 at 9:09
Wonder why it failed.I used for loop like this, but it couldnt treat it as array. It still list out all items inside. for GPGDIRLIST in $GPGDIRLISTS
– user548682
Jun 15 '16 at 9:09
@user548682 because you added an extra set of parentheses. Try
GPGDIRLISTS=( $(grep -Po 'GPGDIRLIST=K.*' ${CONF_FILE} | tr ':' ' ') ).– terdon♦
Jun 15 '16 at 9:11
@user548682 because you added an extra set of parentheses. Try
GPGDIRLISTS=( $(grep -Po 'GPGDIRLIST=K.*' ${CONF_FILE} | tr ':' ' ') ).– terdon♦
Jun 15 '16 at 9:11
|
show 8 more comments
Short answer:
array=( `grep -Po '(?<=FILETYPE=).*$' $CONFIG_FILE | tr ':' ' '` )
Explanation: grep uses a "look behind" assertion to return whatever follows "FILETYPE=".
It'll end up declaring the array as:
array=(A B C D)
Then test:
echo "${array[0]} ${array[1]} ${array[2]} ${array[3]}"
Prints:
A B C D
answered Jun 15 '16 at 17:10
Bruno Negrão ZicaBruno Negrão Zica
1514
add a comment |
Short answer:
array=( `grep -Po '(?<=FILETYPE=).*$' $CONFIG_FILE | tr ':' ' '` )
Explanation: grep uses a "look behind" assertion to return whatever follows "FILETYPE=".
It'll end up declaring the array as:
array=(A B C D)
Then test:
echo "${array[0]} ${array[1]} ${array[2]} ${array[3]}"
Prints:
A B C D
answered Jun 15 '16 at 17:10
Bruno Negrão ZicaBruno Negrão Zica
1514
add a comment |
Short answer:
array=( `grep -Po '(?<=FILETYPE=).*$' $CONFIG_FILE | tr ':' ' '` )
Explanation: grep uses a "look behind" assertion to return whatever follows "FILETYPE=".
It'll end up declaring the array as:
array=(A B C D)
Then test:
echo "${array[0]} ${array[1]} ${array[2]} ${array[3]}"
Prints:
A B C D
answered Jun 15 '16 at 17:10
Bruno Negrão ZicaBruno Negrão Zica
1514
Short answer:
array=( `grep -Po '(?<=FILETYPE=).*$' $CONFIG_FILE | tr ':' ' '` )
Explanation: grep uses a "look behind" assertion to return whatever follows "FILETYPE=".
It'll end up declaring the array as:
array=(A B C D)
Then test:
echo "${array[0]} ${array[1]} ${array[2]} ${array[3]}"
Prints:
A B C D
answered Jun 15 '16 at 17:10
Bruno Negrão ZicaBruno Negrão Zica
1514
edited Jun 15 '16 at 19:38
answered Jun 15 '16 at 17:10
Bruno Negrão ZicaBruno Negrão Zica
1514
answered Jun 15 '16 at 17:10
Bruno Negrão ZicaBruno Negrão Zica
1514
answered Jun 15 '16 at 17:10
Bruno Negrão ZicaBruno Negrão Zica
1514
1514
add a comment |
add a comment |
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im using shel ksh
– user548682
Jun 15 '16 at 8:40
What OS are you using? Is it Linux or something else?
– terdon♦
Jun 15 '16 at 8:40
Linux, ksh script.
– user548682
Jun 15 '16 at 8:41