Vinodh
Reputation: 9
I am getting The operator '+' can't be unconditionally invoked because the receiver can be 'null'
DataCell( //ToDo: Calculate the total price for all items
Text(items.fold(0, (previousValue, element) => previousValue + element.itemPrice).toString() ), )
Upvotes: 0
Views: 85
Answers (1)
Josteve Adekanbi
Reputation: 12693
Try specifying the datatype of previousValue
Like so:
items.fold<double>(0, (previousValue, element) => previousValue + element)
Upvotes: 1
Related Questions
- The operator '>' can't be unconditionally invoked because the receiver can be 'null'
- Operator '+' cannot be called on 'String?' because it is potentially null. In Flutter
- The method '+' can't be unconditionally invoked because the receiver can be 'null'. Flutter Dart
- The operator '>=' can't be unconditionally invoked because the receiver can be 'null'
- + isn't defined for the type 'Object
- Operator can't be unconditionally invoked because the receiver can be null
- the operator '<' can't be unconditionally invoked because the receiver can be 'null'
- The operator '<' can't be unconditionally invoked because the receiver can be 'null'. Try adding a null check to the target ('!')
- The operator '>=' can't be unconditionally invoked because the receiver can be 'null'. flutter null safety
- The method '+' was called on null. Receiver: null Tried calling: +(123)