title: reading string from Golang map
body: <p>I am starting in Golang. Currently I want to get the string that is stored to the key <code>key_field</code> from this map:</p>
  
  <pre><code>map[key_field:[76 95 76 105 115 116 105 110 103 73 68]]
  </code></pre>
  
  <p>this map is declared as:</p>
  
  <pre><code>map:= make([]map[string]interface{}, 0)
  </code></pre>
  
  <p>What I want is to store in a string the value contained in that byte array, that values I printed them using <code>fmt.Println</code>
  Thank you so much</p>