table.remove()

Part of the Fundamentals section of Coddy's Lua journey — lesson 62 of 90.

The table.remove() function to make this easy. This function removes an element from a list-style table and automatically adjusts the remaining elements.

The basic syntax for removing the last element is simple:

local items = {"sword", "shield", "potion"}
table.remove(items)  -- removes the last item
print(#items)  -- outputs: 2

When you call table.remove() without specifying a position, it removes the last element by default. The function also returns the removed value, so you can capture it if needed:

local inventory = {"apple", "bread", "water"}
local removedItem = table.remove(inventory)
print(removedItem)  -- outputs: water

Challenge

Easy

Create a backpack management system that demonstrates removing items from your adventure gear. First, create a table named backpack containing exactly four string values: "rope", "torch", "map", and "compass". After creating the table, use table.remove() to remove the last item from the backpack. Finally, print the length of the table using the # operator to confirm the item was successfully removed.

Cheat sheet

Use table.remove() to remove elements from a list-style table:

local items = {"sword", "shield", "potion"}
table.remove(items)  -- removes the last item by default
print(#items)  -- outputs: 2

The function returns the removed value:

local inventory = {"apple", "bread", "water"}
local removedItem = table.remove(inventory)
print(removedItem)  -- outputs: water

Try it yourself

-- TODO: Write your code here
-- Create the backpack table with the required items
-- Remove the last item using table.remove()
-- Print the length of the table using the # operator