ruby - How do I pass an argument to array.map short cut?

Question

(This question already has answers here): question from:https://stackoverflow.com/questions/9932678/how-do-i-pass-an-argument-to-array-map-short-cut

Answer 1

In this case you can do

a.map(&1.method(:+))

But only because 1 + x is usually the same as x + 1.

Here is a discussion of this practice in a performance context.