Getting more from promises.

medium-72e4570f5784-promises.js

// a sample array of items.
const values = [
  'item1',
  'item2'
]

// checkValue(item) is an async that returns true or false.
const promises = values.map(async(item) => checkValue(item).catch(err => err))
const results = await Promise.all(results)
console.log(results); // ['true', 'false'];

// what if we want the item too for ex: [{item: 'item1', result: true}, {item: 'item2', result: false}]
const promises2 = values.map(async(item)=> ({
  item,
  result: await checkValue(item).catch(err => err)
}))
const results2 = await Promise.all(promises2)
console.log(results2) // [{item: 'item1', result: true}, {item: 'item2', result: false}]