title: Remove Non-Matching Dataframe Names Nested in A List
body: <p>I have two lists consisting of dataframes - df_quintile and disease_df_quintile. I do not know how to represent them concisely, but this is how they look like in Rstudio:</p>
  
  <p><a href="https://i.stack.imgur.com/4wbLK.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/4wbLK.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/FlCWe.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/FlCWe.png" alt="enter image description here"></a></p>
  
  <p>Notice, disease_df_quintile consists of 5 dataframes (dataframes 1 through 5), while disease_df_quintile consists of 4 (dataframes 2 through 5). I would like to cross check both lists and remove any dataframes that are not shared by both lists - so in this case, I would like to remove the first dataframe from the df_quintile list. How can I achieve this?</p>
  
  <p>Thank you. </p>