How do you a lamp cord switch?

It's actually not too difficult. If you're replacing the switch with a new one, you may not need to cut all of the wires. Some switches only require you to connect the hot wire. If this is the case, there will be a channel along one side of the switch for the neutral wire. You may even be able to open the casing of the existing switch and remove the wires without cutting them, but if not, use wire cutters to cut as close to the switch as you can. Try to avoid cutting the neutral wire. If you have to cut it in order to remove the old switch, strip the insulation and connect the cut ends of the neutral wire together. You can also add a plastic connector to protect the wire at the location where you want your new switch to be.