Recently I discovered how to use multidimensional hashes in Korn Shell. Here are some short code sniplets which show how they work.

Create a multidimensional hash variable:

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$ typeset -A a=([b]='')
$ typeset -A a[b]=([c]='')
$ typeset -A a[b][c]=([d]='e')
$ printf "%B\n" a
(
        [b]=(
                        [c]=(
                                        [d]=e
                        )
        )
)

Extend it with additional values:

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$ typeset -A a[b][c]+=([f]='g')
$ printf "%B\n" a
(
        [b]=(
                        [c]=(
                                        [d]=e
                                        [f]=g
                        )
        )
)

Work with the dimensions to manipulate output:

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$ echo ${!a[*]}
b
$ echo ${!a[b][*]}
c
$ echo ${!a[b][c][*]}
d f
$ echo ${a[b][c][d]}
e
$ echo ${a[b][c][f]}
g

Hope it helps,
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