title: firebase update value of a key in Angular 2(Version 5)
body: <p><a href="https://i.stack.imgur.com/iElbX.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/iElbX.jpg" alt=""></a>
  When i insert data(using push() method) into the firebase it generates a random key as shown in image. I am able to update key values(name and age) using random number(-LExEhDWjwXcj6rGZar9)</p>
  
  <p>Now what i want to achieve is, <strong>i want to update key values(name:"Manjeshwar" age:"27" to name:"somename" age:"20") without using  **-LExEhDWjwXcj6rGZar9</strong> random key**. i want to update it dynamically.</p>