A compact syntax for anonymous functions.
f(..., .env = parent.frame())
a function
The last argument is the body of the function, all others are arguments to the function. If there is only one argument, the formals are guessed from the code.
parent environment of the created function
f(x + y) f(x + y)(1, 10) f(x, y = 2, x + y) f({y <- runif(1); x + y})
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