Shorthand block syntax in Crystal

Question

Is it possible to use a shorthand for blocks in Crystal, e.g.

my_array.sort_by(&:size)

This attempt returns an error:

... expected a function type, not Symbol

Answer 1

You can use this syntax:

my_array = ["123", "22", "1"]
sorted = my_array.sort_by &.size
puts sorted
=> ["1", "22", "123"]