title: Julia: read many files in the working directory
body: <p>I just started learning Julia and I want to read many csv files in my directory. How can I do that?</p>
  
  <p>My directory has the files below and I want to read in all files from trip_data_1 to trip_data_12.</p>
  
  <p>"trip_data_1.csv" 
   "trip_data_10.csv"
   "trip_data_11.csv"
   "trip_data_12.csv"
   "trip_data_2.csv" 
   "trip_data_3.csv" 
   "trip_data_4.csv" 
   "trip_data_5.csv" 
   "trip_data_6.csv" 
   "trip_data_7.csv" 
   "trip_data_8.csv" 
   "trip_data_9.csv" 
   "trip_fare_1.csv" 
   "trip_fare_10.csv"
   "trip_fare_11.csv"
   "trip_fare_12.csv"
   "trip_fare_2.csv" 
   "trip_fare_3.csv" 
   "trip_fare_4.csv" 
   "trip_fare_5.csv" 
   "trip_fare_6.csv" 
   "trip_fare_7.csv" 
   "trip_fare_8.csv" 
   "trip_fare_9.csv" </p>
  
  <p>This is what I have tried:</p>
  
  <pre><code>using DataFrames
  df = readtable(filter!(r"^trip_data", readdir()))
  </code></pre>
  
  <p>But I get <em>MethodError: no method matching readtable(::Array{String,1})</em></p>