title: how to dplyr::inner_join multi tbls or data.frames in R
body: <p>In R, how can I <code>inner_join</code> multiple <code>tbls</code> or <code>data.frame</code>s effectively? </p>
  
  <p>For example:</p>
  
  <pre><code>devtools::install_github("rstudio/EDAWR")
  library(EDAWR)
  library(dplyr)
  data(songs)
  data(artists)
  test &lt;- songs
  colnames(test) &lt;- c("song2", "name")
  inner_join(songs, artists,by="name") %&gt;% inner_join(test,by="name")
  </code></pre>
  
  <p>There are hundreds <code>test</code>-like <code>data.frames</code> that I want join.</p>