I am getting The operator ' ' can't be unconditionally invoked because the receiver c-CodePudding

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I am getting The operator ' ' can't be unconditionally invoked because the receiver c

Time：01-15

DataCell( //ToDo: Calculate the total price for all items

Text(items.fold(0, (previousValue, element) => previousValue element.itemPrice).toString() ), )

CodePudding user response：

Try specifying the datatype of previousValue

Like so:

 items.fold<double>(0, (previousValue, element) => previousValue   element)