array-append.sh

# Declare a string array
arrVar=("AC" "TV" "Mobile" "Fridge" "Oven" "Blender")

# Add new element at the end of the array
arrVar+=("Dish Washer")
echo ${arrVar[@]}

# split string to array
my_string="Ubuntu;Linux Mint;Debian;Arch;Fedora"  
my_array=($(echo $my_string | tr ";" "\n"))
echo ${my_array[@]}":  "${my_array[0]}", "${my_array[1]}

# file in array, read file into array
mapfile -t arrVar < my_file_with_lines.txt

# Iterate the loop to read and print each array element
for value in "${arrVar[@]}"; do
    echo $value
done

# is element in array 
# 1 - candidate
# 2 - array of elements 
function is_in_array () {
  local next_array_element search_string="$1"
  shift
  for next_array_element; do [[ "${next_array_element}" == "${search_string}" ]] && return 0; done
  return 1
}


is_in_array "Mobile" ${arrVar[@]}

is_in_array "Mobile" "${arrVar[@]}"
# is_in_array_result="$?"
# if [[ $is_in_array_result > 0 ]]; then 
if [[ "$?" > 0 ]]; then 
    echo " not in "
else
    echo "Mobile"" in array"
fi

##########################################
folders=(one two three four)
reverse_array() {
    local array=("$@")
    local length=${#array[@]}
    local reversed_array=()

    for (( i=$length-1; i>=0; i-- )); do
        reversed_array+=("${array[i]}")
    done

    echo "${reversed_array[@]}"
}
reversed=$(reverse_array "${folders[@]}")
for each_folder in ${reversed[@]}; do
    echo $each_folder
done