to_proc_shorthand

🔗 Use Symbol#to_proc Shorthand

The &:method_name syntax converts a symbol to a block with #to_proc. Beyond simple maps, you can combine it with methods like slice_before, sort_by, and even user-defined methods for elegant one-liners.

users = [ OpenStruct.new(name: "Alice"), OpenStruct.new(name: "Bob") ]
names = users.map(&:name)
# => ["Alice", "Bob"]

# Group numbers whenever an even number appears
[1,2,3,4,5,6].slice_before(&:even?).to_a
# => [[1], [2, 3], [4, 5], [6]]