Check null in ternary operation

Question

I wanna put a default value on a textfield if _contact is not null. To do this

new TextField(
    decoration: new InputDecoration(labelText: \"Email\"), 
    ma         


        

Answer 1

Dart comes with ?. and ?? operator for null check.

You can do the following :

var result = _contact?.email ?? ""

---

You can also do

if (t?.creationDate?.millisecond != null) {
   ...
}

Which in JS is equal to :

if (t && t.creationDate && t.creationDate.millisecond) {
   ...
}