@Ron_Ron You’re missing an ‘e’. It should be spelled Diode. The reason why it works is referred to as leakage current. Leakage current is the bane of designing low-power circuits, and can cause lots of interesting effects when trying to design circuits which need to be shut down while the rest of the circuit continues to operate (typically done for power saving).
I’m a big wire wrap fan. It lets you make prototypes that are vibration resistant, but can be field repaired or modified. This is useful for stuff you are going to strap to rc toys, vehicles or rockets.