Visit Our UNIX and Linux User Community


Help needed on my $format


 
Thread Tools Search this Thread
Top Forums UNIX for Advanced & Expert Users Help needed on my $format
# 1  
Old 03-15-2017
Help needed on my $format

I am stuck with values in existing program perl script...

Code:
my $format ="a40a9a*";

please help me to understand what is the value of "a40a9a*".

Thanks in advance!

Last edited by rbatte1; 03-17-2017 at 08:36 AM.. Reason: Added CODE tags
# 2  
Old 03-17-2017
I suppose it depends on where you then use it. As you have it, it is just a literal string.

It could be used as a filename to search, policy reference for car insurance (to search by type) hardware manufacturer if you are setting up asset tracking system or all sorts of things.

Can you give a bit more context in where you found this and what you are trying to achieve?


Thanks, in advance,
Robin
These 2 Users Gave Thanks to rbatte1 For This Post:
# 3  
Old 03-17-2017
Hi.

N.B.:
Quote:
Originally Posted by rbatte1
Can you give a bit more context in where you found this and what you are trying to achieve?
This looks like a pack/unpack format.

See man perlpacktut, where code like:
Code:
... unpack("A10xA27xA7A*" ...

is discussed.

See perldoc -f pack for a table of the format descriptors.

Best wishes ... cheers, drl
These 2 Users Gave Thanks to drl For This Post:
# 4  
Old 03-17-2017
Thanks Robin and drl.

Found the answer "a40" is 4th column of the line and "a9a" is nine bytes length.

Admin,

Please close the thread.

Thanks once again!

Previous Thread | Next Thread
Test Your Knowledge in Computers #776
Difficulty: Medium
The Fourier transform (FT) decomposes a function of time (a signal) into its constituent frequencies.
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Help! needed to displaying an output in record format

Hi Friends, Am new to Unix world and this is my first post in this forum. I was stuck in displaying the content. while displaying the content the below points to be taken care 1 ) The header format is repeating 2) To display the value in table format... (2 Replies)
Discussion started by: rocky2013
2 Replies

2. Shell Programming and Scripting

Need script for transferring bulk files from one format to text format

"Help Me" Need script for transferring bulk files from one format to text format in a unix server. Please suggest (2 Replies)
Discussion started by: Kranthi Kumar
2 Replies

3. Shell Programming and Scripting

Needed touch command to create a file in the following format

needed touch command to create a file in the following format touch a_yyyymmdd_hhmmss (1 Reply)
Discussion started by: hemanthsaikumar
1 Replies

4. Shell Programming and Scripting

Conversion of below Tabs Tex file into CSV format file : shell script needed

Request if some one could provide me shell script that converts the below "input file" to "CSV format file" given Name Domain Contact Phone Email Location ----------------------- ------------------------------------------------ ------- ----- ---------------------------------... (7 Replies)
Discussion started by: sreenath1037
7 Replies

5. Shell Programming and Scripting

Converting windows format file to unix format using script

Hi, I am having couple of files which i used to copy from windows to Linux, so now in case of text files (CTRL^M) appears at end of line. I know i can convert this windows format file to unix format file by running dos2unix. My requirement here is that i want to do it automatically using a... (5 Replies)
Discussion started by: sarbjit
5 Replies

6. Shell Programming and Scripting

Retaining the Unix CSV format in Excel format while exporting

Hi All, I have created a Unix Shell script whch creates a *.csv file and export it to Excel. The problem i am facing is that Users wants one of the AMOUNT field in comma separted values. Example : if the Amount has the value as 3000000 User wants to be in 3,000,000 format. This Amount format... (2 Replies)
Discussion started by: rawat_me01
2 Replies

7. Shell Programming and Scripting

Help needed to format mysql output

Hi all, Does anyone know how to format the output from mysql from within a shell script? i.e. RESULT=`mysql command` echo ${RESULT} the ${RESULT} only displays the output on one line instead of how mysql would display it as columns etc (3 Replies)
Discussion started by: muay_tb
3 Replies

8. Shell Programming and Scripting

Help needed to convert delimited to CSV format

I have a file with the data as follows.. FILE 1|#START|Jan 22 15:03 FILE 1|#END|Jan 22 16:06 FILE 2|#START|Jan 22 5:15 FILE 2|#END|Jan 22 5:25 FILE 3|#START|Jan 22 07:03 FILE 3|#END|Jan 22 08:15 FILE 4|#START|Jan 22 16:09 FILE 4|#END|Jan 22 16:55 FILE 1|#START|Jan 22 18:15 FILE... (5 Replies)
Discussion started by: karthikd214
5 Replies

9. UNIX for Dummies Questions & Answers

To convert multi format file to a readable ascii format

Hi I have a file which has ascii , binary, binary decimal coded,decimal & hexadecimal data with lot of special characters (like öƒ.ƒ.„İİ¡Š·œƒ.„İİ¡Š· ) in it. I want to standardize the file into ASCII format & later use that as source . Can any one suggest a way a logic to convert such... (5 Replies)
Discussion started by: gaur.deepti
5 Replies

10. Shell Programming and Scripting

help needed in date format

i need to grep date in the format year-month-day,,,,,,, actually i need to grep those dates other than current date.......... can anyone help me in this...........i need a format of date which would grep previous date except current date (1 Reply)
Discussion started by: ali560045
1 Replies

Featured Tech Videos