title: AWK to get columns with non zero values
body: <p>Any better idea to get columns / fields having non zero values.</p>
  
  <p>Data</p>
  
  <pre><code>      col1 col2 col3 .... col50
        1      0   1         1
  </code></pre>
  
  <p>so output should be</p>
  
  <pre><code>    col1  col3 .... col50
      1       1         1
  </code></pre>
  
  <p>Edit: Example was wrong, so edited it.</p>