title: Append key data from the GO MAP
body: <p>I have a map in GO of the type :</p>
  <pre><code>var userinputmap = make(map[string]string)
  </code></pre>
  <p>The values in it are like :</p>
  <pre><code>userinputmap[&quot;key1&quot;] = value1
  userinputmap[&quot;key2&quot;] = value2
  userinputmap[&quot;key3&quot;] = value3
  </code></pre>
  <p>How can I generate a string that contains al the above keys in comma seprated format?</p>
  <pre><code>output:= &quot;key1,key2,key3&quot;
  </code></pre>