topic Re: shell script in Operating System - HP-UX

shell script

tarek_3 — Thu, 10 Apr 2003 11:08:23 GMT

hi all
is there aby way to use array in shell script to save variables
thanks

Re: shell script

Yogeeraj_1 — Thu, 10 Apr 2003 11:17:18 GMT

Re: shell script

Duncan Edmonstone — Thu, 10 Apr 2003 11:18:59 GMT

yes, but only one dimensional arrays.

e.g. in korn/posix

i[0]="foo"
i[1]="bar"
i[2]="baz"

for x in 0 1 2
do
echo ${i[${x}]}
done

HTH

Duncan

Re: shell script

Ricky B. Nino — Fri, 11 Apr 2003 08:24:54 GMT

Hi Tarek,

Yes you can...

Like in any other programming languages Arrays in Korn SHELL are variables that contain more than one value.

example...

integer my_array
my_array[0]=5
my_array[1]=16

The first element of an array is indexed by 0, the second element is 1, and so on. The largest index value that is valid for array is 1023.

You must enclose an array reference in braces for the korn shell to recognize it as such.

For example...
${my_array[1]}

Instead of...
$my_array[1]

The syntax for accessing the value of the nth array element is, where n is an integer... {my_array[n]}

To print the values of all array elements, use the syntax: {my_array[*]}

To print the actual number of elements (assigned values) in the array use the syntax: {#array_name[*]}

Array elements do not have to be assigned in order. Moreover, you can skip the assignment of values to any elements you want. For instance....

my_array[2]=2
my_array[5]=3
my_array[1023]=1

Array elements that are skipped over are not assigned a value and, effectively, are treated as though they do not exist.

Hope this helps...

best regards...

Re: shell script

Ramkumar Devanathan — Fri, 11 Apr 2003 08:48:41 GMT

hi,

In k-shell use set with -A option to declare an array and read output of a command into the array in one step.

$ set -A users `awk -F: '{print $1}' /etc/passwd`

$ echo ${users[0]}
root

hope this helps.

- ramd.

Re: shell script

Zafar A. Mohammed_1 — Fri, 11 Apr 2003 20:27:33 GMT

Hi Tarek,

Use this URL documentation for compelete reference also:
http://docs.hp.com/hpux/pdf/B2355-90046.pdf

Thanks
Zafar