Bash 4+ supports key-value associative arrays. Must `declare -A` first — Bash won't infer it. Iterate keys with !arr[@].
Bash
declare -A users=(
[alice]=admin
[bob]=editor
[carol]=viewer
)
# Access
echo "${users[alice]}" # admin
# All keys / values
echo "${!users[@]}" # alice bob carol (order not guaranteed)
echo "${users[@]}" # admin editor viewer
# Iterate
for u in "${!users[@]}"; do
echo "$u -> ${users[$u]}"
done
# Add / remove
users[dave]=admin
unset 'users[bob]'
# Membership check
[[ -v users[alice] ]] && echo "alice exists"Save your own code snippets
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