title: In-place replacement
body: <p>I have a CSV. I want to edit the 35th field of the CSV and write the change back to the 35th field. This is what I am doing on bash:</p>
  
  <pre><code>awk -F "," '{print $35}' test.csv  | sed -i 's/^0/+91/g'
  </code></pre>
  
  <p>so, I am pulling the 35th entry using awk and then replacing the "0" in the starting position in the string with "+91". This one works perfet and I get desired output on the console. </p>
  
  <p>Now I want this new entry to get written in the file. I am thinking of sed's "in -place" replacement feature but  this fetuare needs and input file. In above command, I cannot provide input file because my primary command is awk and sed is taking the input from awk.</p>
  
  <p>Thanks.</p>