3 ms·

what `contains` what? you could write this in Go if m[key] { } the comma ok idiom simply lets you distinguish a "zero" value from a missing value.

• ndr 4y ago
  Agreed that `key in m` or `m.contains(key)` would be clearer, but checking the value rather than the presence is asking for trouble.
• simiones 4y ago
  `if m[key] { }` is only valid Go if m is a map from something to bool, so I don't know what you even mean.