array operations

array operations.sh

# for loop array
# Reference: https://www.tutorialkart.com/bash-shell-scripting/bash-append-an-array-to-another-array/
array=( one two three )
for i in "${array[@]}"
do
	echo "$i"
done

# append array
# Reference: https://www.tutorialkart.com/bash-shell-scripting/bash-append-an-array-to-another-array/
arr1=("apple" "banana" "cherry")
arr2=("mango" "grape")
arr1+=(${arr2[@]})
echo ${arr1[@]}


# join array
# Reference: https://zaiste.net/posts/how-to-join-elements-of-array-bash/
function join { local IFS="$1"; shift; echo "$*"; }

join , ${arr[@]}
1,a,2,b,c,d,e,3

result=$(join , ${arr[@]})
echo $result