docs: function all(iterable){
      var C          = this
        , capability = newPromiseCapability(C)
        , resolve    = capability.resolve
        , reject     = capability.reject;
      var abrupt = perform(function(){
        var values    = []
          , index     = 0
          , remaining = 1;
        _forOf(iterable, false, function(promise){
          var $index        = index++
            , alreadyCalled = false;
          values.push(undefined);
          remaining++;
          C.resolve(promise).then(function(value){
            if(alreadyCalled)return;
            alreadyCalled  = true;
            values[$index] = value;
            --remaining || resolve(values);
          }, reject);
        });
        --remaining || resolve(values);
      });
      if(abrupt)reject(abrupt.error);
      return capability.promise;
    }