What's that "for i, val : list: ..." syntax?

开发者_StackOverflowI remember that that syntax existed in some language! for i, val : list {...} would be like {int i = 0; for val : list {...; i++;}}, but which language was that?

This exact syntax is unknown (and probably won't work in any language). So what I can offer would be

• Java Iterators:

  for(String i : new String[]{"one", "two"})
      print(i);
  

• C foreach macro

  for_each_item(i, processes) {
      i->wakeup();
  }
  

• JavaScript foreach:

  for each (var property in obj) {
      print(property);
  }
  

Oh hey, I forgot about this question!

Later I discovered that I had been remembering Python's

for i, v in enumerate(list):
    print('elem', v, 'is at idx', i)