Well, i am bit confused... So i make changes you was writing... Script isn't working, so you are right, i need to check it... Thanks a lot... And that array.
I need to put the the longest line or lines into the array... Well, i thought that it could be like this
I a, having a hard time trying to figure out what you are trying to do. You mention using reading standard input, but I see no read statements. Besides that would not even be possible, at least you could only determine the longest line in standard input, not in multiple files.
Why would this not work:
Code:
print_help ()
{
echo "The longest line in file or files"
echo "-h shows help"
}
for i in "$@"; do
case "$1" in
-h) print_help
exit 0
esac
done
awk 'length==L{p=p RS L FS "\""$0"\""} length > L{L=length; p=L FS "\""$0"\""}END{ print p}' "$@"
This User Gave Thanks to Scrutinizer For This Post:
It looks like i didn't tell clearly... Sorry for that... The input could be files, or nothing and in that case i should use stdin. Then should script find the longest possible line or eventually lines. Of course, -h could be there to echo help. I rewrite some of that rubbish that there was before... Now, my scritp looks like this....
Code:
#! /usr/local/bin/bash2
print_help ()
{
echo "the longest line or lines in stdin or file or files"
echo "-h show help"
}
riadok=""
for i in "$@"; do
case "$i" in
-h) vypis_helpu
exit 0
;;
*)
riadok=$(awk 'length==L{r=r RS L FS ""$0""} length > L{L=length; r=L FS ""$0""}END{ print r}' "$i")
pole=("${pole[@]}" "$riadok")
;;
esac
shift
done
for i in "${pole[@]}"; do
echo "$i" | sort -n | tail -1
done
exit 0
Now i have a problem with set the output from awk to the variable riadok and then to put riadok into array. Hope, that this is more accurate than my last comment.
---------- Post updated at 10:16 AM ---------- Previous update was at 10:15 AM ----------
So it is "the longest line or lines in stdin or file or files"
i tried to use awk inside of for to ensure, that awk will be executed for every file, that comes in. And then, the longest line or possible lines should be written to the variable. So in the and, i should have array of strings with the longest lines from all files... And from that array i choose the longest..
---------- Post updated at 10:27 AM ---------- Previous update was at 10:24 AM ----------
it gonna be automatic test and i shouldn't use cat... And i must figure out how to patch that for stdin inside script...
The awk already does all that it chooses the longest line(s) from all files. I just used cat as an example to generate input on stdin for the shell script, you can use any process there. Inside the script the awk statement will then either read the files provided as parameters to the script or read from stdin if not file names are provided.
Last edited by Scrutinizer; 10-26-2010 at 07:52 AM..
This User Gave Thanks to Scrutinizer For This Post:
Well, i just finish testing... Awk is now good but it put all the lines into variable... So if i have 3 longest lines with same length, awk save all three to riadok... So it is not very good. But if awk find all longest lines from every file on input, how can i find the longest from the longest?
---------- Post updated at 11:14 AM ---------- Previous update was at 11:01 AM ----------
That code of yours isn't working, i tried to execute script ./script aaa bbb ccc...
and it didn't read stdin, just error message showed...
---------- Post updated at 11:34 AM ---------- Previous update was at 11:14 AM ----------
I need to get output from this to the variable riadok. It works, when i've got files with only one the longest line in each file. But when it is more than that in single file, it put all lines into single variable. How can i fix this? I tried these options:
Hello,
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Hi ,
i have a file with data as below.This is same file. But actual file contains to many rows.
i want to search for a string "Field 039 00" and delete that line and previous 3 lines in that file.. Can some body suggested me how can i do using either sed or awk command ?
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hgacdavd
sndm,ACNMSDC
msgid "Rome"
msgstr ""
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I need to find the longest string in a select field and print that field.
I have tried a few different methods and I always end up one step from where I need to be.
Methods thus far:
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Good Morning/Afternoon All,
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Dear All,
To find the length of the longest line from a file i have used wc -L which is giving the proper output...
But the problem is AIX os does not support wc -L command.
so is there any other way 2 to find out the length of the longest line using awk or sed ?
Regards,
Pankaj (1 Reply)
10-26-2010
