index.js
function (events, func) {
    for (var i = 0; i < events.length; i++) {
      obj.once(events[i], func)
      listeners[events[i]] = func
    }
  }
function (events, func) {
    for (var i = 0; i < events.length; i++) {
      obj.once(events[i], func)
      listeners[events[i]] = func
    }
  }
function ( events , func ) { for ( var i = 0 ; i < events . length ; i ++ ) { obj . once ( events [ i ] , func ) listeners [ events [ i ] ] = func } }
Adds an array of events to the object with the given func
Adds an array of events to the object with the given func