How can I get unique values from an array in Bash?

Question

I\'ve got almost the same question as here.

I have an array which contains aa ab aa ac aa ad, etc. Now I want to select all unique elements from this ar

Answer 1

I realize this was already answered, but it showed up pretty high in search results, and it might help someone.

printf "%s\n" "${IDS[@]}" | sort -u

Example:

~> IDS=( "aa" "ab" "aa" "ac" "aa" "ad" )
~> echo  "${IDS[@]}"
aa ab aa ac aa ad
~>
~> printf "%s\n" "${IDS[@]}" | sort -u
aa
ab
ac
ad
~> UNIQ_IDS=($(printf "%s\n" "${IDS[@]}" | sort -u))
~> echo "${UNIQ_IDS[@]}"
aa ab ac ad
~>