Bash Script

一：数组

     取最后一个元素：echo ${ARR1[${#ARR1[@]}-1]}  echo ${ARR1[@]:(-1)}echo "${array[-1]}"(Bash 4.2)

     To get both the index and the value:

for index in "${!array[@]}"do    echo "$index ${array[index]}"done

     移除元素: unset,

     shift: array=("${array[@]:1}")#removed the 1st element