title: How to get keys from an array in typescript
body: <pre><code>value =   {
       5c03dbc3d8e3e3435f875a46: "1", 
       5c03dc0fd8e3e3435f875a48: "2", 
       5c03dc30d8e3e3435f875a49: "3", 
       5c03dc5fd8e3e3435f875a4a: "4"
       }
  </code></pre>
  
  <p>I have an array like this. I want to get key from this array, so that I can use it to get values associated with those keys. This all is for typescript.</p>