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Implementing Set#to_proc and Hash#to_proc in Ruby

• steventhedev 12y ago
  FYI - 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.
  • byroot 12y ago
    > & 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.