javascript sum array values by key

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Greta
02 Jul 2020
1var array = [
2  {name: "Peter", age: 43},
3  {name: "John", age: 32},
4  {name: "Jake", age: 21}
5];
6
7array.reduce(function(sum, current) {
8  return sum + current.age;
9}, 0); // 43 + 32 + 21 = 96
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