How to add all the values of a map to have the total of 14000?
Map<String, int> salary = {
"user1": 4000,
"user2": 4000,
"user3": 3000,
"user4": 3000,
};
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1 Answer
Firstly, you just care about the values of this map, not care about the keys, so we work on the values by this:
var values = salary.values;
And we can use reduce to combine all the values with sum operator:
var values = salary.values;
var result = values.reduce((sum, element) => sum + element);
print(result);
You can reference some basic of List & Map here:
https://api.dartlang.org/stable/1.10.1/dart-core/List-class.html https://api.dartlang.org/stable/1.10.1/dart-core/Map-class.html
1 Comment
Yo Apps
Its correct... But please consider .fold() as it can be used in more cases than .reduce(). Also its safer with list that might present an empty value from a returning http call