Shell Programming and Scripting

In shell script how to do the following .......................

For example
I have following 3 variables

VARIABLE_DYNAMIC
JOB_NP_22="ABCD"
JOB_NP_88="HELLO"

based on the value in VARIABLE_DYNAMIC the particular variable value should be displayed
--------------------------------------------------------------
(I) If value of VARIABLE_DYNAMIC="JOB_NP_21"
so by some way i should get value of "JOB_NP_21" i.e ABCD as output

(II) If value of VARIABLE_DYNAMIC="JOB_NP_88"
so by some way i should get value of "JOB_NP_88" i.e HELLO as output

we can retrive variable directly $VARIABLE_DYNAMIC
but as the value in VARIABLE_DYNAMIC is coming dynamically..... i am facing problems in retriving values of the variable (JOB_NP_21 / JOB_NP_88)

Please tell me how to do that

Code:

eval echo \$$VARIABLE_DYNAMIC

hi anil,

do u want to give the variable as user input or is shud take dynamically?

hi era / subhendu ,

can u please tell me how do i assign the value which i get from this
eval echo \$$VARIABLE_DYNAMIC

to a variable

See the JOB_NP_22 and JOB_NP_88 are actually arrays...
The actual strucure of my variable would be
JOB_NP_22[0]=a,b
JOB_NP_22[1]=c,d

JOB_NP_88[0]=m,n
JOB_NP_88[1]=o,p

i will get these values and loop through the elements ...

Basically the String JOB_NP_22 and JOB_NP_88
will be created partly by "JOB_NP" ( this is hard coded ) and
22 /88 passed as paramters so its a combination of 2

However my hardcode variable loop works
for (( cnt = 0 ; cnt < ${#JOB_NP_22[@]} ; cnt++ ))
do
echo ${JOB_NP_22[cnt]}
done



Need to replace this hardcoded loop and make it dynamic
So please tell me how to assign it to an array and use the array across in my code for looping

hi anil,

try the following

set -A JOB_NP_22 a,b c,d

while [ $i -lt 2 ]
do
print ${JOB_NP_22[$i]}
((i=i+1))
done


and also do the same for variable
"JOB_NP_88"

Hi,

The array looping for JOB_NP_22 / JOB_NP_88 part is done...

Problem is with the initial part for retriving values i.e
taking value of variable name in VARIABLE_DYNAMIC String


Can the value which we get from this
eval echo \$$VARIABLE_DYNAMIC
be put in array
It is required in the array for loopingthrough elements

anil plz make it clear...so that i will able to ans ur questions...