Re: split to walk into an HoH ?

[Marc Chantreux]

hello Bruce,

> The first key of each second level is missing, which differs from your sample 
> output above.
> Have I corrupted your Awk code, or have I misunderstood something, or what?

you just spotted a bug: the first subkey *is* indeed required. actually
fixing the bug makes the awk version even shorter.

    fix () {
        awk -F, '{print $1"     "$2}' |
        sort -u                   |
        awk -F" " '
            seen != $1 { seen = $1; print $1 }
            { print "\t"$2 }
        '
    }

regards
marc