title: xargs - place the argument in a different location in the command
body: <p>Let's say I want to write a script that does <code>ls</code> with a prefix for each filename. I tried this</p>
  
  <pre><code>ls | xargs -n 1 echo prefix_
  </code></pre>
  
  <p>But the result was</p>
  
  <pre><code>prefix_ first_file
  prefix_ second_file
  ...
  </code></pre>
  
  <p>How can I remove the space between the prefix and the filename? I.e. how to I make xargs put the variable after the command, without space? (Or in any other place for that matter)</p>