1206. Sum of positive

ou get an array of numbers, return the sum of all of the positives ones.

Example [1,-4,7,12] => 1 + 7 + 12 = 20

Note: if there is nothing to sum, the sum is default to 0.

Solution:

int positiveSum(List<int> arr) {
  int result = 0;
  for (int a in arr) {
    if (a > 0) {
      result += a;
    }
  }
  return result;
}

int positiveSum(List<int> arr) {
  return arr.where((l) => l > 0).fold(0, (p, c) => p + c);
}

import "dart:math";

int positiveSum(List<int> xs) {
  return xs.fold(0, (a, x) => a + max(x, 0));
}