code: function(object, callback) {
        return inject(object, [], function(selected, key, value){
          if (callIterator(callback, key, value))
            selected.push(value)
        })
      }
docs: Returns an array of values collected when the callback
  given evaluates to true.
  
  @param  {hash, array} object
  @return {function} callback
  @return {array}
  @api public