How to remove an element?

In Bash, you can remove an element from an array using the unset command. Here’s how you can do it:

Syntax

unset array_name[index]

Example

Suppose you have an array named fruits:

fruits=("Apple" "Banana" "Cherry")

If you want to remove "Banana" (which is at index 1), you would do:

unset fruits[1]

Resulting Array

After running the unset command, the fruits array will look like this:

echo ${fruits[@]}  # Outputs: Apple Cherry

Note

• The index of the removed element will leave a "gap" in the array. If you want to re-index the array (i.e., remove the gap), you can create a new array or use a loop to rebuild it.

Re-indexing Example

Here’s how you can re-index the array after removing an element:

# Create a new array without the unset element
new_fruits=()
for fruit in "${fruits[@]}"; do
    if [[ -n $fruit ]]; then
        new_fruits+=("$fruit")
    fi
done

fruits=("${new_fruits[@]}")

Now, fruits will be re-indexed without any gaps.

If you have any more questions or need further clarification, feel free to ask!