bad substitution


 
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# 1  
bad substitution

Code:
#!/bin/bash

a1=( win 12,01,02,03,04 )
a2=( pre 04,05,06 )
a3=( msn 06,07,08,09 )

Given the above arrays, I want the script to return/echo the following in a loop;
Code:
win
12,01,02,03,04

pre
04,05,06,07

msn
06,07,08,09

But I can't get it to do as such.

I've tried;

Code:
for i in `seq 1 3`; do
  echo ${a$i[0]}
  echo ${a$i[1]}
done

But I get the following error
Code:
./xxx.sh: line 9: ${a$i[0]}: bad substitution

How can I rectify the problem?

Last edited by Scott; 01-11-2011 at 01:07 PM.. Reason: Please use code tags
# 2  
Hi.

Try using eval:
Code:
$ cat MyTest
a1=( win 12,01,02,03,04 )
a2=( pre 04,05,06 )
a3=( msn 06,07,08,09 )

for i in {1..3}; do
  eval echo \${a$i[0]}
  eval echo \${a$i[1]}
done

$ ./MyTest
win
12,01,02,03,04
pre
04,05,06
msn
06,07,08,09

This User Gave Thanks to Scott For This Post:
# 3  
thanks - that works.
 

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