[R] `mapply(function(x) function() x, c("a", "b"))$a()' returns `"b"'

[Casper Ti. Vector]

As the title says, I want to apply a function (which itself returns
a function) to a list (or vector), and get a list (or vector) of
generated functions as the return value, but get unexpected result.

Anyone with an idea about the reason of this phenomenon and a correct
way to implement the requirements? Thanks very much :)

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