Implementing Set#to_proc and Hash#to_proc in Ruby
1–3 of 3 posts
Re: Implementing Set#to_proc and Hash#to_proc in Ruby
#2FYI - the ampersand syntax is only in function calls, so the following will fail:
&set.call(1)
(1..30).select(&set)
Re: Implementing Set#to_proc and Hash#to_proc in Ruby
#3FYI - the ampersand syntax is only in function calls, so the following will fail: &set.call(1) Whereas this will not: (1..30).select(&set) Generally speaking, & is syntactic sugar for .to_proc, but only within function calls.
> & is syntactic sugar for .to_proc, but only within function calls
It's not exactly that. & is the syntax to pass a variable as a block to a method. And ruby will implicitly call to_proc on the object it receive as a block.
I know it seems pedantic, but there is a difference.