Often I want to do something like the following:

sapply(sapply(x, unique),sum)

Which I can also write as:

sapply(x, function(y) sum(unique(y)))

But I don't like to write out the lambda each time. So is there some kind of function that lets me write?

sapply(x, concat(sum,unique))

And concat just concatenates the two functions, thus creates a new one, which executes one after the other.

r functional-programming
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