title: SlickGrid Columns - Difference between id and field
body: <p>A simple question i cant workout. In a column definition whats the difference between the field property and the id property...Fx..</p>
  
  <p>columns.push({ id: "officeId", name: "Office Id", field: "officeId", width: 40 });</p>
  
  <p>When would they be different/why two?</p>
  
  <p>Thanks?
  Tim</p>