The best I have found is sortable-table by stevenrskelton

github: https://github.com/stevenrskelton/sortable-table

also on http://component.kitchen/components

how can I create data table component by Polymer
Imagine the following written conversation, as recently occurred via SMS between me and a friend (edited for brevity):


  A: What are you going to do today?
  
  B:  I don't know.  Go shopping?


What is the meaning of the question mark in the reply?  Is person B asking a question of person A?  If so, why would person B expect person A to know the answer in this case? If not, why use the question mark?
