In Ruby, how do I make a hash from an array?

Question

I have a simple array:

arr = [\"apples\", \"bananas\", \"coconuts\", \"watermelons\"]

I also have a function f that will perfo

Answer 1

Ruby 2.6.0 enables a shorter syntax by passing a block to the to_h method:

arr.to_h { |a| [a, f(a)] }