Sponsored Content
Top Forums Shell Programming and Scripting How to assign value to variable using cut? Post 302925007 by Corona688 on Thursday 13th of November 2014 01:29:19 PM
Old 11-13-2014
No need to waste time using an external utility, the shell can do this all by itself.

Code:
# Read the first line of color.txt
read LINE < color.txt
# Throw away the first character.  Works like ${VAR:START:LENGTH}
LINE="${LINE:1}"

Depending on what your data looks like, there may be even more efficient ways to do this reading several values at once without cut or other externals.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Assign variables with cut

I need to read a file (a list) and assign the value to a variable (for each line), I'm looping until the end of the file. My problem is, I want to assign 2 separate variables from the list. The process I'm using is: awk '{print $3}' file1 > file2 awk '{print $4}' file1 > file3 cat file2... (2 Replies)
Discussion started by: douknownam
2 Replies

2. Shell Programming and Scripting

assign a value to a variable

I have a list of names in a file. i want to assign those names to a variable in such a manner eg: $cat file.txt pete lisa john var=pete-lisa-john how do i do this in shell scripting? (10 Replies)
Discussion started by: Shivdatta
10 Replies

3. UNIX for Dummies Questions & Answers

to assign cut values to an array

i need to seperate values seperated by delimiters and assign it to an array.. can u plz help me on that. Variables = "asd,rgbh,(,rty,got,),sroe,9034," i need to assign the variables into arrays.. like.. var=asd var=rgbh.. and so on how do i do this. i need to reuse the values stored in... (6 Replies)
Discussion started by: Syms
6 Replies

4. UNIX for Dummies Questions & Answers

Cut Command value assign to variable

Hi, I am new to UNIX Scripting. I have been trying to use the CUT command to retrieve part of the header from a file and assign it to a variable. I have tried searching a lot, but I am still unsuccessful. Sample Header: HJAN BALANCE 20090616 I need to retrieve the date here, which always... (10 Replies)
Discussion started by: ragz_82
10 Replies

5. Shell Programming and Scripting

assign awk's variable to shell script's variable?

Dear All, we have a command output which looks like : Total 200 queues in 30000 Kbytes and we're going to get "200" and "30000" for further process. currently, i'm using : numA=echo $OUTPUT | awk '{print $2}' numB=echo $OUTPUT | awk '{print $5}' my question is : can I use just one... (4 Replies)
Discussion started by: tiger2000
4 Replies

6. Shell Programming and Scripting

Shell assign variable to another variable

How can I assign a variable to an variable. IE $car=honda One way I can do it is export $car=honda or let $car=2323 Is there any other ways to preform this task (3 Replies)
Discussion started by: 3junior
3 Replies

7. Shell Programming and Scripting

Cut text and assign them into array

file.txt : is delimiter: abc:def:ghi jkl:mno: pqr 123:456:789 if I do the cut command, and cut the first column, and echo it out I will get the output: abc jkl 123 How can I assign the column of text that I've cut into Array? e.g If I were to echo array array it will output as:... (9 Replies)
Discussion started by: andylbh
9 Replies

8. UNIX for Beginners Questions & Answers

Need to pass variable in a command and assign value to a variable

Hello All, Hope you're doing well ! I am trying below command to be passed in a shell script, header_date_14 is a variable and $1 is the name of a file I intend to pass as a command line argument, however command line argument is not being accepted. header_date_14=$(m_dump... (8 Replies)
Discussion started by: ektubbe
8 Replies

9. UNIX for Beginners Questions & Answers

How can I assign awk's variable to shell script's variable?

I have the following script, and I want to assign the output ($10 and $5) from awk to N and L: grdinfo data.grd | awk '{print $10,$5}'| read N L output from gridinfo data.grd is: data.grd 50 100 41 82 -2796 6944 0.016 0.016 3001 2461. where N and L is suppose to be 3001 and 100. I use... (8 Replies)
Discussion started by: geomarine
8 Replies

10. UNIX for Beginners Questions & Answers

Assign value to variable

Hi Guys, I need to assign the value of which has rows to a variable, Can you advise how to do that hive --orcfiledump /hdfs_path/ | grep "Rows" Rows: 131554 I need to assign this row count itself to a unix variable count=$(hive --orcfiledump /hdfs_path/ | grep "Rows") Expected ... (6 Replies)
Discussion started by: Master_Mind
6 Replies
IO::InnerFile(3)					User Contributed Perl Documentation					  IO::InnerFile(3)

NAME
IO::InnerFile - define a file inside another file SYNOPSIS
### Read a subset of a file: $inner = IO::InnerFile->new($fh, $start, $length); while (<$inner>) { ... } DESCRIPTION
If you have a filehandle that can seek() and tell(), then you can open an IO::InnerFile on a range of the underlying file. PUBLIC INTERFACE
new FILEHANDLE, [START, [LENGTH]] Class method, constructor. Create a new inner-file opened on the given FILEHANDLE, from bytes START to START+LENGTH. Both START and LENGTH default to 0; negative values are silently coerced to zero. Note that FILEHANDLE must be able to seek() and tell(), in addition to whatever other methods you may desire for reading it. set_length LENGTH get_length add_length NBYTES Instance methods. Get/set the virtual length of the inner file. set_start START get_start add_start NBYTES Instance methods. Get/set the virtual start position of the inner file. binmode close flush getc getline print LIST printf LIST read BUF, NBYTES readline seek OFFFSET, WHENCE tell write ARGS... Instance methods. Standard filehandle methods. VERSION
$Id: InnerFile.pm,v 1.4 2005/02/10 21:21:53 dfs Exp $ AUTHOR
Original version by Doru Petrescu (pdoru@kappa.ro). Documentation and by Eryq (eryq@zeegee.com). Currently maintained by David F. Skoll (dfs@roaringpenguin.com). perl v5.12.1 2005-02-10 IO::InnerFile(3)
All times are GMT -4. The time now is 11:49 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy