Flutter How to get length of a iterable .toList() list?

Question

I want to Display a ListView with Cards from FirebaseFirestore. Also, I want to show how many Cards there are at all:

int Length = 0; //?

How to get length of a iterable .toList() list?

     Column(
         children: snapshot.data!.docs
             .map(
                (doc) => 
                   Card(
                    title: doc["title"],)
                 .toList(
                growable: true,
             ),
          ),
       ),

Solution

Column(
         ...snapshot.data!.docs
             .asMap().map((index, value) => MapEntry(index, Card(
                    title: value["title"],)))
                 .values.toList(
                growable: true,
             ),
          ),
      

Comments

[Benyamin]

just add .length at the end of it: .toList().length;

[Cubii]

Error: The argument type 'int' can't be assigned to the parameter type 'List<Widget>'.

[Benyamin]

Get the length before building the widget tree, and then use it in the tree.

[novol]

did it help you?

[Cubii]

can you tell me how I can set the State of the int Length for the number of the cards?

[novol]

why do you need it? Your widget will be built based on the length

[Cubii]

that's the point I want the length based on the generated length of the list? Or does this not work?

[novol]

this method include itemCount, if you want get length use snapshot.data!.docs.length