golang get key from map code example

Example 1: golang map has key

if val, ok := dict["foo"]; ok {
    //do something here
}

Example 2: go get from map

var id string
var ok bool
if x, found := res["strID"]; found {
     if id, ok = x.(string); !ok {
        //do whatever you want to handle errors - this means this wasn't a string
     }
} else {
   //handle error - the map didn't contain this key
}