Still happens to me as a programmer when diving deeper into the domain. Just to continue on the "number" theme: that address-form you recently built is probabl

Still happens to me as a programmer when diving deeper into the domain. Just to continue on the "number" theme: that address-form you recently built is probably wrong: https://en.wikipedia.org/wiki/House_numbering https://en.wikipedia.org/wiki/House_numbering (where "wrong" is considered in the larger domain. It is probably "right" for your use-case and niche-domain, though. E.g. where you are certain you'll never ship to Thailand. Ever)