Maximum length of a string Post: 302963037

Sponsored Content

Top Forums Shell Programming and Scripting Maximum length of a string Post 302963037 by durden_tyler on Tuesday 22nd of December 2015 03:14:02 PM

12-22-2015

Registered User

Do you want to find the length of each line in a file?
Here's a complete example with a few methods to find the length:

Code:

$ 
$ cat data.log
cadena1
cadenados
cadenatercera
cadenatercera
beer
$ 
$ cat line_length.sh
#!/bin/bash
FILE="data.log"
while read linea
do
    largo=$(echo $linea | awk '{print length($0)}')   # One way to find length
    len=${#linea}                                     # And another way to find length
    len1=$(awk -v L=$linea 'BEGIN{print length(L)}')  # And another way to find length
    len2=$(expr length $linea)                        # And another way to find length
    len3=$(echo -n $linea | wc -c)                    # And another way to find length
    echo $largo,$len,$len1,$len2,$len3
done < $FILE
$ 
$ . line_length.sh
7,7,7,7,7
9,9,9,9,9
13,13,13,13,13
13,13,13,13,13
4,4,4,4,4
$ 
$

The title of the post suggests that maybe you want to find the maximum length of a line in a file.
Do you want to find out the length of the longest line in your file?
In that case, a complete example is posted below:

Code:

$ 
$ cat data.log
cadena1
cadenados
cadenatercera
cadenatercera
beer
$ 
$ cat max_line_length.sh
#!/bin/bash
MAX=0
FILE="data.log"
while read linea
do
    len=${#linea}
    if [ $len -gt $MAX ]
    then
        MAX=$len
    fi
done < $FILE
echo "Max length is $MAX"
$ 
$ . max_line_length.sh
Max length is 13
$ 
$

This User Gave Thanks to durden_tyler For This Post:

durden_tyler

View Public Profile for durden_tyler

Find all posts by durden_tyler

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Maximum file name length

Hi folks, Can anybody tell me whether there is any limit on the file name length and directory name length in UNIX.

2. UNIX for Dummies Questions & Answers

Maximum Command Length for Korn shell

What is the maximum size of a command which can be given in telnet command prompt in unixfor Korn shell?

3. UNIX for Dummies Questions & Answers

Maximum Command Length

What is the maximum size of a command which can be given in telnet command prompt in unix?

4. UNIX for Dummies Questions & Answers

what is the maximum length of th os-command line in Unix.

Hi All, I didn't find any thread that match this question so I hope it's not redundant. I am totally new to Unix. I want to know what is the maximum length of the os-commandline in Unix. Will it cause any problem if I run any application whose total path length is much longer than 256...

5. UNIX for Dummies Questions & Answers

Maximum length of a path given as an argument to a shell script

hi, I am using solaris10. I have to write a bourne shell script, which copies files for the said destination path which is passed as an argument to the script. it looks like this myscript.sh /var/test -->destination path now i would like to know what is the maximum length i can...

6. Shell Programming and Scripting

what is the maximum length of a unix shell variable which can be can passed to plsql

what is the maximum length of a unix shell variable which can be can passed to plsql variable:(

7. UNIX for Dummies Questions & Answers

How to increase the maximum record length

Hi, I need to create a file of record length more than 300 characters. But in my unix box, i am able to create a file only with a maximum of 256 characters per record. Is there anyway i can create a file with more than 300 characters in this case? Or How to increase the maximum record...

8. Shell Programming and Scripting

Maximum command length in bourne shell

Hi, I wanted to know what is the maximum length of command which can be run on a bourne (sh) shell? Where can I find that information? Is it different for different OS flavors? Please help. Thanks, Vineet

9. Shell Programming and Scripting

Is there a maximum length for a shell script command?

Is there a maximum length for a shell script command? How can I detect that in my OS? For example, if I have something like: command A | command B | command C | awk '{print $1 $2 $3 $4 $5}' then can we break the commands and also the arguments inside awk ? Thanks

10. Programming

Maximum length of a line

How can I change the maximum length of a programming line in fortran and C (specifically in fortran 77)? Seems the default maximum length is 72 in fortran 77. Thanks.

LEARN ABOUT OSX

euc

EUC(5)							      BSD File Formats Manual							    EUC(5)

NAME

     euc -- EUC encoding of wide characters

SYNOPSIS

     ENCODING "EUC"

     VARIABLE len1 mask1 len2 mask2 len3 mask3 len4 mask4 mask

DESCRIPTION

     EUC implements a system of 4 multibyte codesets.  A multibyte character in the first codeset consists of len1 bytes starting with a byte in
     the range of 0x00 to 0x7f.  To allow use of ASCII, len1 is always 1.  A multibyte character in the second codeset consists of len2 bytes
     starting with a byte in the range of 0x80-0xff excluding 0x8e and 0x8f.  A multibyte character in the third codeset consists of len3 bytes
     starting with the byte 0x8e.  A multibyte character in the fourth codeset consists of len4 bytes starting with the byte 0x8f.

     The wchar_t encoding of EUC multibyte characters is dependent on the len and mask arguments.  First, the bytes are moved into a wchar_t as
     follows:

     byte0 << ((lenN-1) * 8) | byte1 << ((lenN-2) * 8) | ... | bytelenN-1

     The result is then ANDed with ~mask and ORed with maskN.  Codesets 2 and 3 are special in that the leading byte (0x8e or 0x8f) is first
     removed and the lenN argument is reduced by 1.

     For example, the ja_JP.eucJP locale has the following VARIABLE line:

     VARIABLE	     1 0x0000 2 0x8080 2 0x0080 3 0x8000 0x8080

     Codeset 1 consists of the values 0x0000 - 0x007f.

     Codeset 2 consists of the values who have the bits 0x8080 set.

     Codeset 3 consists of the values 0x0080 - 0x00ff.

     Codeset 4 consists of the values 0x8000 - 0xff7f excluding the values which have the 0x0080 bit set.

     Notice that the global mask is set to 0x8080, this implies that from those 2 bits the codeset can be determined.

SEE ALSO

     mklocale(1), setlocale(3)

BSD
								 November 8, 2003							       BSD