Should .off(event, listener) remove all occurences?

[ryanve]

I'm not crazy about energy().off(event, listener, quota?) having the optional quota. Without the documentation it's hard to know what it is. It only applies to the rare case of having the same listener listening to the same event more than once. I'd like to decide on the more useful behavior and remove the option, or maybe provide a separate function.

Node's (new EventEmitter).off(event, listener) removes only the most recent occuence. I was surprised to discover that. My guess was that it'd remove all occurences like how jQuery({}).off(event, listener) does.

[ryanve]

One idea I had to handle this is to add .addListener and .removeListener that are fully compatible with EventEmitter where they're aliases for .on and .off. We could have .removeListener remove 1 and .off remove all. .addListener could be an alias for .on like in EventEmitter.