The fold method in dart is used for:
Reducing a collection to a single value by iteratively combining each element of the collection with an existing value
Uses [initialValue] as the initial value, then iterates through the elements and updates the value with each element using the [combine] function, as if by:
var value = initialValue;
for (E element in this) {
value = combine(value, element);
}
return value;
The fold method in dart just acts like the reduce method in javascript
Another example of the fold method in dart :
double get totalNetSpend {
return groupedTransactionData.fold(0.0, (sum, item) {
return sum + (item['amount'] as double);
});
}
Top comments (1)
this is awesome