korn shell array

[astreet]

I use array in korn shell

set -A color red blue green
set -A mobile nokia se moto
m=color
k=mobile

I am able to echo the color like below
# echo ${color[1]}
red

however, I am not able to echo the variable like below
# echo ${$m[1]}
ksh: ${$m[1]}: bad substitution

any idea?

[vsemaska]

You have to define m & k as arrays like you did color and mobile

set -A color red blue green
set -A mobile nokia se moto

set -A m ${color[*]}
set -A k ${mobile[*]}

[astreet]

Thanks for your reply

I am not going to pass the whole array to m or k.
what i want is use m or k as the name of array

color is the name of first array
set -A color red blue green

${array name[index]}

# echo ${color[1]}
red

# echo ${$m[1]}

instead of using color as array name directly...my script actually need to use $m to replace the array name....

I tried many combination but cant work also
echo "${$m[1]}"
echo ${"$m"[1]}
echo $"{"$m[1]"}"
echo ${`echo $m`[1]}....

[vsemaska]

Try this:

eval echo \${${m}[1]}

[astreet]

Try this:

eval echo \${${m}[1]}

it return
server:/ >echo \${${m}[1]}
${color[1]}

it only return ${color[1]} as string but not the value of the array in index one.
suppose return red

[vsemaska]

You forgot the 'eval'

eval echo \${${m}[1]}

[likwid]

Yea, use bash.

[astreet]

You forgot the 'eval'

eval echo \${${m}[1]}

Oh my god.....it really work....
Thanks.....
You solved my question within few mins which i spent 2 hours but couldn't find any solution...

btw...what is eval for? evaluate? or stand for other meaning

[vsemaska]

The manpage for ksh states:

eval command ...
The arguments are concatenated (with spaces between them) to
form a single string which the shell then parses and executes
in the current environment.

What you're doing is constructing the command you want to execute and using eval to execute it.

[astreet]

The manpage for ksh states:

eval command ...
The arguments are concatenated (with spaces between them) to
form a single string which the shell then parses and executes
in the current environment.

What you're doing is constructing the command you want to execute and using eval to execute it.

i see...
mean echo \${${m}[1]} will return ${color[1]} and can use eval to execute the return value like
eval ${color[1]}

Thanks....
Thanks...