Re: Organising conditions

[Greg Wooledge]

On Mon, Aug 02, 2021 at 06:17:43PM +0000, hancooper wrote:
> declare -A aa=([a]="Joe" [b]="Peter" [c]="Sammy")
> keyv ${aa[@]}
> 
> I get no output.

unicorn:~$ keyv() {
  local -n _keyv_array="$1"
  local _keyv_key
  for _keyv_key in "${!_keyv_array[@]}"; do
    printf 'Key:   %s\n' "$_keyv_key"
    printf 'Value: %s\n' "${_keyv_array[$_keyv_key]}"
  done
}
unicorn:~$ keyv aa
Key:   1
Value: 3
Key:   x
Value: y
unicorn:~$ declare -p aa
declare -A aa=([1]="3" [x]="y" )


And here's the dreaded name collision:

unicorn:~$ keyv _keyv_array
bash: local: warning: _keyv_array: circular name reference
bash: warning: _keyv_array: circular name reference
bash: warning: _keyv_array: circular name reference

That's why I mangled the local variable names.  It's done to protect
against *that*, or worse.