[SOLVED] Help with bash script

trintukaz · 10-02-2011, 12:43 AM

Code:

#!/bin/bash 
echo text file name  
read x
maxlength=0
while IFS= read -r line
do
if [ ${#line} -eq $maxlength ]; then
p="${p}
${#line} \"$line\""
elif [ ${#line} -gt $maxlength ]; then
p="${#line} \"$line\""
maxlength=${#line}
fi
done < "$x"
echo "$p"

This script shows longest line. How i can make a script which shows number of longest line

trintukaz · 10-02-2011, 04:08 AM

any ideas?

a4z · 10-02-2011, 04:12 AM

if I understand the question right, just remember the line number

Code:

#!/bin/bash 
echo text file name  
read x
maxlength=0
linenr=0

while IFS= read -r line
do
let "linenr += 1"
if [ ${#line} -eq $maxlength ]; then
p="${p}
${#line} \"$line\""
elif [ ${#line} -gt $maxlength ]; then
p="${#line} \"$line\" in line ${linenr}"
maxlength=${#line}
fi
done < "$x"
echo "$p"

trintukaz · 10-02-2011, 04:45 AM

You understood right but I need just number of line without text

a4z · 10-02-2011, 04:54 AM

just remove all unwanted

#!/bin/bash
echo text file name
read x
maxlength=0
linenr=0

while IFS= read -r line
do
let "linenr += 1"
if [ ${#line} -eq $maxlength ]; then
p="${p}
${#line} \"$line\""
elif [ ${#line} -gt $maxlength ]; then
p=${linenr}
maxlength=${#line}
fi
done < "$x"
echo "$p"

trintukaz · 10-02-2011, 05:11 AM

Thank you. There is a problem if text file have few longest lines
output

Quote:

1
3 "669"
3 "459"

text file

Quote:

456
669

459

grail · 10-02-2011, 05:19 AM

Your if requests that it gets printed. Maybe you need to explain better what you are looking for?

trintukaz · 10-02-2011, 05:25 AM

i need only line number without text. First line written good but rest of lines shows text and not that number where the longest line is. Hope you understand.

grail · 10-02-2011, 05:39 AM

Well assuming I understand:

Code:

#!/bin/bash

l=m=0

while read -r line
do
    ((l++))

    if (( ${#line} > m ))
    then
        m=${#line}
        p=$l
    fi
done<file

echo $p

trintukaz · 10-02-2011, 05:49 AM

Text file have 3 equal lines, this script shows only one. I need all.

grail · 10-02-2011, 06:01 AM

So what would be the output with your previous example?

trintukaz · 10-02-2011, 06:10 AM

For example text file

Quote:

blah
blah
blah

blah

Output should be

Quote:

longest lines
1
2
3
5

grail · 10-02-2011, 06:35 AM

Right ... so then something like:

Code:

#!/bin/bash

l=0

while read -r line
do
    ((l++))
    [[ ${a[${#line}]} ]] && a[${#line}]+=" $l" || a[${#line}]=$l
done<$1

echo ${a[@]:(-1)}

trintukaz · 10-02-2011, 06:43 AM

Thank you very much for your pation.