#2723 - Add Two Promises

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Problem Description

Given two promises promise1 and promise2, return a new promise. promise1 and promise2 will both resolve with a number. The returned promise should resolve with the sum of the two numbers.

Solution

/**
 * @param {Promise} promise1
 * @param {Promise} promise2
 * @return {Promise}
 */
var addTwoPromises = async function(promise1, promise2) {
  return Promise.all([promise1, promise2]).then(([a, b]) => a + b);
};