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Remove duplicated string stored in variable

I have a variable $var with this content:

var=word1,word2,word3,word1,word3

and I need to delete duplicate words and the results is required stored in the same variable $var.

Solution

  • Try 

        var="word1,word2,word3,word1,word3"
    list=$(echo $var | tr "," "\n")
    var=($(printf "%s\n" "${list[@]}" | sort | uniq -c | sort -rnk1 | awk '{ print $2 }'))
 echo  "${var[@]}"