Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Passing values from file into array in Bash
Top Forums UNIX for Dummies Questions & Answers Passing values from file into array in Bash Post 302732077 by ShiGua on Friday 16th of November 2012 02:04:27 PM
Old 11-16-2012
Passing values from file into array in Bash
Hi,

I'm trying to write a bash script that takes a file and passes each line from the file into an array with elements separated by column.

For example:

Sample file "file1.txt":

Code:
1 name1 a first
2 name2 b second
3 name3 c third

and have arrays such as:

Code:
line1 = ( "1" "name1" "a" "first" )
line2 = ( "2" "name2" "b" "second" ) 
line1 = ( "3" "name3" "c" "third" )

I'd also like to know if it's possible to pass each column of values into its own array, such as:

Code:
column1 = ( "1" "2" "3" )
column2 = ( "name1" "name2" "name3" )
column3 = ( "a" "b" "c" )
column4 = ( "first" "second" "third" )

Thank you!
Last edited by Scrutinizer; 11-16-2012 at 11:01 PM.. Reason: code tags
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

scripting: multiple values from file passing to command

one of my colleagues has this question. he has a command, C_CMD which accepts 4 variables, $1 $2 $3 $4 he wants to load up a file with multiple rows, one row per set of variables and then iteratively execute the command based on the content of the file. example: at the command line you'd... (5 Replies)
Discussion started by: LisaS
5 Replies

2. UNIX for Dummies Questions & Answers

How to store the values in a file into an array

Hi, I do have a file and the contents are as follws: 10 20 30 40 50 Now I want to store those values into an array. How can be done this ?? (3 Replies)
Discussion started by: risshanth
3 Replies

3. Shell Programming and Scripting

[BASH - KSH] Passing array to a function

Passing a array to a function, a basic feature in modern language, seems to be only possible in KSH. Not in BASH. Depite all my efforts I couldn't come to a solution. See the following examples: It works perfectly in KSH: #!/usr/bin/ksh function print_array { # assign array by indirect... (3 Replies)
Discussion started by: ripat
3 Replies

4. Shell Programming and Scripting

Passing a file handler and an array from Perl to Shell Script

Hi there, I am trying to call a shell script from a Perl script. here is the code: @args = ("sh", "someshellprg.sh", "a file handler", "an array"); system(@args) == 0 or die "system @args failed: $?"; in the shell program, I examine if the arguments exits using: if then echo... (5 Replies)
Discussion started by: pinkgladiator
5 Replies

5. Shell Programming and Scripting

[bash] passing array to function

Hi, I'm trying to write a function that reassigns an array to another local array but the method used in reassigning the array reformats the contents of the array which is what I am trying to prevent. The method used to load a file into an array works as expected and the entire array is... (4 Replies)
Discussion started by: ASGR
4 Replies

6. Shell Programming and Scripting

Greping array values in Bash like Perl

Hi, Is there an easy way to simulate following Perl code in Bash. if ( grep {$my_value eq $_} @ARGV ){ print "Do Something\n"; } else { die "Invalid value"; } (0 Replies)
Discussion started by: paragkalra
0 Replies

7. Shell Programming and Scripting

Bash Passing An Array

Good grief so this should be easy. Passing an array as an argument to a function. Here is the sample code: #/bin/bash function foo { local p1=${1} local p2=(${2}) local p3=${3} echo p1 is $p1 echo p2 is $p2 echo p3 is $p3 } d1=data1 d2=data2 a=(bat bar baz) (2 Replies)
Discussion started by: brsett
2 Replies

8. Shell Programming and Scripting

Passing values to an XML file from shell script

:wall: Hi, I have an XML file with 5 tags. I need to pass values to the XML file from a shell script that will replace values in 2 of the tags. I cannot hardcode the tag values in XML and use replace command in script as the values are likely to change. Please help !!!!!!!!!!! (2 Replies)
Discussion started by: Monalisaa
2 Replies

9. Shell Programming and Scripting

Values rotation in array with bash

Hello :) I created a little script that allow to make a rotation of values in an array. The goal was to shift the values to the right and that the last value of the array became the first value in order to create a rotation. The purpose of the exercice was to do it without using a temporary... (3 Replies)
Discussion started by: Nexy
3 Replies

10. Homework & Coursework Questions

Values rotation in array with bash

Hello :) I created a little script that allow to make a rotation of values in an array. The goal was to shift the values to the right and that the last value of the array became the first value in order to create a rotation. The purpose of the exercice was to do it without using a temporary... (6 Replies)
Discussion started by: Nexy
6 Replies

LEARN ABOUT BSD

symlink

SYMLINK(2)							System Calls Manual							SYMLINK(2)

NAME

       symlink - make symbolic link to a file

SYNOPSIS

       symlink(name1, name2)
       char *name1, *name2;

DESCRIPTION

       A  symbolic link name2 is created to name1 (name2 is the name of the file created, name1 is the string used in creating the symbolic link).
       Either name may be an arbitrary path name; the files need not be on the same file system.

RETURN VALUE

       Upon successful completion, a zero value is returned.  If an error occurs, the error code is stored in errno and a -1 value is returned.

ERRORS

       The symbolic link is made unless on or more of the following are true:

       [ENOTDIR]      A component of the name2 prefix is not a directory.

       [EINVAL]       Either name1 or name2 contains a character with the high-order bit set.

       [ENAMETOOLONG] A component of either pathname exceeded 255 characters, or the entire length of either path name exceeded 1023 characters.

       [ENOENT]       The named file does not exist.

       [EACCES]       A component of the name2 path prefix denies search permission.

       [ELOOP]	      Too many symbolic links were encountered in translating the pathname.

       [EEXIST]       Name2 already exists.

       [EIO]	      An I/O error occurred while making the directory entry for name2, or allocating the inode for name2, or writing out the link
		      contents of name2.

       [EROFS]	      The file name2 would reside on a read-only file system.

       [ENOSPC]       The directory in which the entry for the new symbolic link is being placed cannot be extended because there is no space left
		      on the file system containing the directory.

       [ENOSPC]       The new symbolic link cannot be created because there there is no space left on the file system that will contain  the  sym-
		      bolic link.

       [ENOSPC]       There are no free inodes on the file system on which the symbolic link is being created.

       [EDQUOT]       The  directory  in  which the entry for the new symbolic link is being placed cannot be extended because the user's quota of
		      disk blocks on the file system containing the directory has been exhausted.

       [EDQUOT]       The new symbolic link cannot be created because the user's quota of disk blocks on the file system  that	will  contain  the
		      symbolic link has been exhausted.

       [EDQUOT]       The user's quota of inodes on the file system on which the symbolic link is being created has been exhausted.

       [EIO]	      An I/O error occurred while making the directory entry or allocating the inode.

       [EFAULT]       Name1 or name2 points outside the process's allocated address space.

SEE ALSO

       link(2), ln(1), unlink(2)

4.2 Berkeley Distribution					  August 26, 1985							SYMLINK(2)
All times are GMT -4. The time now is 08:53 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy