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  1. Prepare
  2. Linux Shell
  3. Arrays in Bash
  4. Concatenate an array with itself
  5. Discussions

Concatenate an array with itself

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  • aniket_dewa
     + 0 comments

    cat | xargs | awk '{print 0, $0}'

    easy

  • asfalt_tilkisi65
     + 0 comments
    declare -a aray=()

while IFS= read -r line || [ -n "$line" ]; do
    aray=("${aray[@]}" "$line")
done

doublearray=(${aray[@]} ${aray[@]} ${aray[@]})

echo ${doublearray[@]}

  • ajitshetty9900
     + 0 comments
    • readarray -t arr
    • transarr=("{arr[@]}" "{transarr[@]}"

  • nficara01
     + 0 comments
    xargs yes 2>/dev/null | head -n 3 | tr $'\n' ' '

    Nifty trick

  • RinaldiHaugen
     + 0 comments

    "Concatenating an array with itself creates a new array with the elements of the original array repeated twice in sequence." lotusbook247.com login