title: Lapply to Add Columns to Each Dataframe in a List
body: <p>my question is two-fold..</p>
  
  <ol>
  <li>I have a list of dataframes, and using lapply in R, I would like to add a column to each dataframe in the list.</li>
  <li>The added column should actually take values sequentially from a list, if possible. I have a list that is the same length as the list of dataframes, and each value in that list should be the added column value.</li>
  </ol>
  
  <p>The reason I'm doing this is because the file name of each data set I'm importing has date info, e.g. the file name contains Jun12_2003. So I want to import each data set, and then assign a column for year and date, taking the info from the file name (so far doing that part with regexp).</p>
  
  <p>Thanks for any help!</p>