Bash Arrays

function extract() { local -n myarray=$1 local idx=$2 echo "${myarray[$idx]}" } Fruits=('Apple' 'Banana' 'Orange') extract Fruits 2 # => Orangle 

Fruits=("${Fruits[@]}" "Watermelon") # Push Fruits+=('Watermelon') # Also Push Fruits=( ${Fruits[@]/Ap\*/} ) # Remove by regex match unset Fruits[2] # Remove one item Fruits=("${Fruits[@]}") # Duplicate Fruits=("${Fruits[@]}" "${Veggies[@]}") # Concatenate lines=(`cat "logfile"`) # Read from file 

Fruits=('Apple' 'Banana' 'Orange') for e in "${Fruits[@]}"; do echo $e done 

#With index

for i in "${!Fruits[@]}"; do printf "%s\t%s\n" "$i" "${Fruits[$i]}" done 

Fruits=('Apple' 'Banana' 'Orange') Fruits[0]="Apple" Fruits[1]="Banana" Fruits[2]="Orange" ARRAY1=(foo{1..2}) # => foo1 foo2 ARRAY2=({A..D}) # => A B C D # Merge => foo1 foo2 A B C D ARRAY3=(${ARRAY1[@]} ${ARRAY2[@]}) # declare construct declare -a Numbers=(1 2 3) Numbers+=(4 5) # Append => 1 2 3 4 5