Completing the count of charcters in every line with dots

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I would like to know how to count the characters in every line in a text, then subtracting this number from a threshold represents the maximum number of characters allowed per line, after then I would like to fill the gaps between the maximum number of characters and the count of characters with dots. For example:

Unix was 
originally meant 
to be a 
co
nvenient p
latform for progra
mmers developing software to
 be run on it and on other 
systems, rather than for non-
programmers.
[7][8] The system grew larger
 as the operating system star
ted spreading in a
cademic circ
les, as users add
ed their own tools to th
e system and shared them wi
th colleagues.

The maximum number of characters over all the lines is /31/ in line#11. I would like the count of characters in every line to be /31/ by filling the empty spaces with dots, like this:

Unix was , .....................
originally meant , .............
to be a , ......................
co, ............................
nvenient p, ....................
latform for progra, ............
mmers developing software to, ..
be run on it and on other , ....
systems, rather than for non-,..
programmers., ..................
[7][8] The system grew larger,..
as the operating system star, ..
ted spreading in a, ............
cademic circ, ..................
les, as users add, .............
ed their own tools to th, ......
e system and shared them wi, ...
th colleagues., ................

How can I do that in bash?

edited 5 mins ago

Goro

8,79564384

asked 1 hour ago

Shervan

34811

add a commentÂ |Â

up vote
1
down vote

favorite

Unix was 
originally meant 
to be a 
co
nvenient p
latform for progra
mmers developing software to
 be run on it and on other 
systems, rather than for non-
programmers.
[7][8] The system grew larger
 as the operating system star
ted spreading in a
cademic circ
les, as users add
ed their own tools to th
e system and shared them wi
th colleagues.

The maximum number of characters over all the lines is /31/ in line#11. I would like the count of characters in every line to be /31/ by filling the empty spaces with dots, like this:

Unix was , .....................
originally meant , .............
to be a , ......................
co, ............................
nvenient p, ....................
latform for progra, ............
mmers developing software to, ..
be run on it and on other , ....
systems, rather than for non-,..
programmers., ..................
[7][8] The system grew larger,..
as the operating system star, ..
ted spreading in a, ............
cademic circ, ..................
les, as users add, .............
ed their own tools to th, ......
e system and shared them wi, ...
th colleagues., ................

How can I do that in bash?

edited 5 mins ago

Goro

8,79564384

asked 1 hour ago

Shervan

34811

add a commentÂ |Â

up vote
1
down vote

favorite

Unix was 
originally meant 
to be a 
co
nvenient p
latform for progra
mmers developing software to
 be run on it and on other 
systems, rather than for non-
programmers.
[7][8] The system grew larger
 as the operating system star
ted spreading in a
cademic circ
les, as users add
ed their own tools to th
e system and shared them wi
th colleagues.

The maximum number of characters over all the lines is /31/ in line#11. I would like the count of characters in every line to be /31/ by filling the empty spaces with dots, like this:

Unix was , .....................
originally meant , .............
to be a , ......................
co, ............................
nvenient p, ....................
latform for progra, ............
mmers developing software to, ..
be run on it and on other , ....
systems, rather than for non-,..
programmers., ..................
[7][8] The system grew larger,..
as the operating system star, ..
ted spreading in a, ............
cademic circ, ..................
les, as users add, .............
ed their own tools to th, ......
e system and shared them wi, ...
th colleagues., ................

How can I do that in bash?

edited 5 mins ago

Goro

8,79564384

asked 1 hour ago

Shervan

34811

Unix was 
originally meant 
to be a 
co
nvenient p
latform for progra
mmers developing software to
 be run on it and on other 
systems, rather than for non-
programmers.
[7][8] The system grew larger
 as the operating system star
ted spreading in a
cademic circ
les, as users add
ed their own tools to th
e system and shared them wi
th colleagues.

The maximum number of characters over all the lines is /31/ in line#11. I would like the count of characters in every line to be /31/ by filling the empty spaces with dots, like this:

Unix was , .....................
originally meant , .............
to be a , ......................
co, ............................
nvenient p, ....................
latform for progra, ............
mmers developing software to, ..
be run on it and on other , ....
systems, rather than for non-,..
programmers., ..................
[7][8] The system grew larger,..
as the operating system star, ..
ted spreading in a, ............
cademic circ, ..................
les, as users add, .............
ed their own tools to th, ......
e system and shared them wi, ...
th colleagues., ................

How can I do that in bash?

bash

edited 5 mins ago

Goro

8,79564384

asked 1 hour ago

Shervan

34811

edited 5 mins ago

Goro

8,79564384

asked 1 hour ago

Shervan

34811

edited 5 mins ago

Goro

8,79564384

edited 5 mins ago

Goro

8,79564384

edited 5 mins ago

Goro

8,79564384

asked 1 hour ago

Shervan

34811

asked 1 hour ago

Shervan

34811

asked 1 hour ago

Shervan

34811

add a commentÂ |Â

2 Answers
2

active

oldest

votes

up vote
1
down vote

accepted

Try this code:

#!/bin/bash
 # This loop is to count the number of bytes per line, then it will find the max number of bytes over all the lines
max=$(cat datafile| while IFS=" " read line; do echo "$line" | wc -c; done | sort -k 1.1n | tail -n1)

cat datafile| while IFS=" " read line; do 
# Count of bytes in every line
n=$(echo "$line" | wc -c) 

# bytes difference in every line
diff=$(echo $(($max-$n))) 

# complete the number of bytes per line to the max number of bytes over all the lines.
dash=$(printf %"$diff"s | tr " " ".")

# print results
echo $line,$dash
done

output:

Unix was,.....................
originally meant,.............
to be a,......................
co,...........................
nvenient p,...................
latform for progra,...........
mmers developing software to,.
be run on it and on other,....
systems, rather than for non-,
programmers.,.................
[7][8] The system grew larger,
as the operating system star,.
ted spreading in a,...........
cademic circ,.................
les, as users add,............
ed their own tools to th,.....
e system and shared them wi,..
th colleagues.,...............

edited 1 hour ago

answered 1 hour ago

Goro

8,79564384

add a commentÂ |Â

up vote
1
down vote

For text processing tasks, I'd suggest using something like Awk or Perl in place of bash e.g.

perl -lnE '
 push @a, $_; $max = length $_ > $max ? length $_ : $max 
 } tail -n1)

cat datafileimprove this answer

answered 56 mins ago

steeldriver

33k34982

add a commentÂ Â

up vote
1
down vote

For text processing tasks, I'd suggest using something like Awk or Perl in place of bash e.g.

perl -lnE '
 push @a, $_; $max = length $_ > $max ? length $_ : $max 
 improve this answer

answered 56 mins ago

steeldriver

33k34982

For text processing tasks, I'd suggest using something like Awk or Perl in place of bash e.g.

perl -lnE '
 push @a, $_; $max = length $_ > $max ? length $_ : $max 
 { 
 foreach $x (@a) say $x, ", ", "."x($max - length $x)
' file
Unix was , ....................
originally meant , ............
to be a , .....................
co, ...........................
nvenient p, ...................
latform for progra, ...........
mmers developing software to, .
 be run on it and on other , ..
systems, rather than for non-, 
programmers., .................
[7][8] The system grew larger, 
 as the operating system star, 
ted spreading in a, ...........
cademic circ, .................
les, as users add, ............
ed their own tools to th, .....
e system and shared them wi, ..
th colleagues., ...............

answered 56 mins ago

steeldriver

33k34982

answered 56 mins ago

steeldriver

33k34982

answered 56 mins ago

steeldriver

33k34982

answered 56 mins ago

steeldriver

33k34982

add a commentÂ |Â

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