I am trying to assign the contents of file e.g
ls "$HOME"
into an array. If it is possible then please guide me without using the concept of awk,sed, and perl16
Thanks (10 Replies)
I am trying to write a piece of code that will call a value from an array. There are multiple arrays that I need to call data from. Only one array needs to be used based on the step within the program. The arrays have the names "cue_0", "cue_1", and so on.
I can't figure out how to call a value... (2 Replies)
Greetings folks,
I am trying to assign the output of a dscl command (contains name<spaces>id) to a variable as an array. Currently I am piping the output into a tmp file, then reading the tmp file into an array, then parsing the array. I would like to bypass creating the tmp file portion of... (6 Replies)
I want to ask the user to enter an X amount of file names. I want to put those names into an array and then loop back through them to verify they are in the directory. 1st- How would I assign the value to an array and what is the correct syntax. 2nd- how would i reference that array after I... (3 Replies)
Hi,
I have a piece of code as follows:
i=0
while read LINE
do
var = "$LINE"
i=$((i+1))
echo "${var}"
done < file
I want to assign value to the array var.
However, when i execute the script i get a error.
Please can you help me know what i am missing.
I ultimately want to... (2 Replies)
Hi every one.. I'm new to shell scripting... I would like to assign a single array element to a variable... Is it possible to do it....
Could any body help me.... (3 Replies)
Hi,
I have requirement to assign values to variables which are created dynamically.
Below is the code which i am using to achieve above requirement.
#!/bin/ksh
oIFS="$IFS"; IFS=','
STR_FAIL_PARENT_IF_FAILS="WF_F_P_IF_FAILS1,WF_F_P_IF_FAILS2,WF_F_P_IF_FAILS3"
set -A... (1 Reply)
is it possible to assign value to an array variable from an external file?? if yes then how??
I am using below code but its not working.
#!bin/bash
myarray < file_name
echo ${mayarray} (6 Replies)
i have this basic code that i wrote to read a file and place it's values to an array. the source/input file will have multiple strings on it that is separated by a whitespace.
sample_list.txt file contents:
ACCT1 TABLE1
ACCT2 TABLE2
ACCT3 TABLE3
script file: sample_list.sh
... (3 Replies)
Discussion started by: wtolentino
3 Replies
LEARN ABOUT CENTOS
env
Env(3) User Contributed Perl Documentation Env(3)NAME
Env - perl module that imports environment variables as scalars or arrays
SYNOPSIS
use Env;
use Env qw(PATH HOME TERM);
use Env qw($SHELL @LD_LIBRARY_PATH);
DESCRIPTION
Perl maintains environment variables in a special hash named %ENV. For when this access method is inconvenient, the Perl module "Env"
allows environment variables to be treated as scalar or array variables.
The "Env::import()" function ties environment variables with suitable names to global Perl variables with the same names. By default it
ties all existing environment variables ("keys %ENV") to scalars. If the "import" function receives arguments, it takes them to be a list
of variables to tie; it's okay if they don't yet exist. The scalar type prefix '$' is inferred for any element of this list not prefixed by
'$' or '@'. Arrays are implemented in terms of "split" and "join", using $Config::Config{path_sep} as the delimiter.
After an environment variable is tied, merely use it like a normal variable. You may access its value
@path = split(/:/, $PATH);
print join("
", @LD_LIBRARY_PATH), "
";
or modify it
$PATH .= ":.";
push @LD_LIBRARY_PATH, $dir;
however you'd like. Bear in mind, however, that each access to a tied array variable requires splitting the environment variable's string
anew.
The code:
use Env qw(@PATH);
push @PATH, '.';
is equivalent to:
use Env qw(PATH);
$PATH .= ":.";
except that if $ENV{PATH} started out empty, the second approach leaves it with the (odd) value "":."", but the first approach leaves it
with ""."".
To remove a tied environment variable from the environment, assign it the undefined value
undef $PATH;
undef @LD_LIBRARY_PATH;
LIMITATIONS
On VMS systems, arrays tied to environment variables are read-only. Attempting to change anything will cause a warning.
AUTHOR
Chip Salzenberg <chip@fin.uucp> and Gregor N. Purdy <gregor@focusresearch.com>
perl v5.16.3 2013-03-02 Env(3)