3 ms·

Using _ as a throwaway variable name is idiomatic in Python, Haskell, and Go. Looks like they're pushing the same idiom in Hack, which I'm ok with.

• agumonkey 13y ago
  AFAIK in Haskell it's not a throwaway variable, a pattern with _ will not create a binding at all. I don't think Python does this, maybe Go.
  • MBlume 13y ago
    Python doesn't have language support for the idiom -- trying to evaluate lambda _, _: None gives SyntaxError: duplicate argument '_' in function definition but tools like pylint will silence unused-variable warnings if the variable starts with '_'.
    • agumonkey 13y ago
      Thanks for the verification. But even a bit of syntactic convention won't be enough if python create a unnecessary binding.
• wycats 13y ago
  And Ruby, and Rust. It's close to universal.
• wtetzner 13y ago
  And Clojure.