There are some short comings about using email codes but I fail to see how this worse than passwords when the same exact kind of attack would work for passwords. The difference being that it would be worse with passwords which can be stored, reused later or sometimes changed directly on the service.
Actually AST edition with touch interface has been experimented by MS Research with Touch develop (https://www.touchdevelop.com/). In their editor you just insert/combine AST parts instead of typing them.
Parent comment is referencing the "let inline" construction that in addition to inline code allows to constrain generic types structurally over member definition[1] instead of by name as usual. This gives us poor's man type classes which is useful nonetheless.
I guess the conclusion is that the definition of duck typing is fuzzy and misleading.
Just a side note, Thumbs.db are no longer created in visited folders since Vista. Mac OS seems to be the last OS that randomly trashes removable mass storage.
Just a slight correction, it's debit cards that are common in France and not credit cards. But yes indeed, at least in Paris, a lot of people buy everything with debit card (you can buy as low as 1€ by debit card in big chains).