Shift array element

Shell Programming and Scripting
1

I want to delete and 0th element of array in shell scrpit and also shift all others to one level up.

2

"unset" is what you are looking for.

unset arr[3]

My code sample follows:

#!/bin/bash

example[1]="one"
example[2]="two"
example[3]="three"
example[4]="four"
example[5]="five"

echo "A simple list, iterate over it to show elements"

for i in "${example[@]}"; do
        echo $i;
done;

echo "Unsetting 3rd element of array with: unset example[3]"
unset example[3]

echo
echo "Iterate over the modified list."

for i in "${example[@]}"; do
        echo $i;
done;

And then I tested it

-bash-3.00$ ./test.sh
A simple list, iterate over it to show elements
one
two
three
four
five
Unsetting 3rd element of array with: unset example[3]

Iterate over the modified list.
one
two
four
five
3 
array=( a b c d e f g h i j k l ) ## define array

unset array[0]              ## remove element
array=( "${array[@]}" )     ## pack array

printf "%s\n" "${array[@]}" ## print array