Apply lambda to an object

Question

Let say I have a variable and lambda defined somewhere

phone = "1(234)567-89-01"
lambda = -> { gsub(/[^0-9]/, '') }

How can I apply lambda to the phone to get 12345678901?

P.S. I know I can go with the following approach:

lambda = -> (arg) { arg.gsub(/[^0-9]/, '') }
lambda.call(phone)
#=> "12345678901"

But I want to be laconic.

Answer 1

You can use BasicObject#instance_exec:

phone.instance_exec &lambda
#=> "12345678901"