[Lua] Remove (and return) a table element by its key

RemoveTableElementByKey.lua

-- Removes (and returns) a table element by its key, moving down other elements to close space and decrementing the size of the array
function table.removeKey(table, key)
    local element = table[key]
    table[key] = nil
    return element
end

-- Test

printf = function(s, ...) return io.write(s:format(...)) end

function table.print(table)
    for key, value in pairs(table) do
        printf('(%s)=(%s)\n', tostring(key), tostring(value))
    end
end

local prefs = {['key1'] = 'value1', ['key2'] = 'value2'}

table.print(prefs)
print('---')

local removedElement = table.removeKey(prefs, 'key1')

table.print(prefs)
print('---')

print(removedElement)

--[[ Result:

(key1)=(value1)
(key2)=(value2)
---
(key2)=(value2)
---
value1

]]