how to sum values in array of objects javascript code example
Example 1: javascript sum array of objects
arr = [{x:1}, {x:3}]
arr.reduce((accumulator, current) => accumulator + current.x, 0);
Example 2: javascript sum of number in object array
run.addEventListener("click", function () {
let sum = people.reduce(function (a, b) {
return {
age: a.age + b.age,
};
});
console.log(sum);
});
Example 3: javascript object array sum of values in object
const fruitTally = fruit.reduce((currentTally, currentFruit) => {
currentTally[currentFruit] = (currentTally[currentFruit] || 0) + 1
return currentTally
} , {})