求数组某个相同值的数字和

const list = [
  { unit: '瓶', count: 1 }, { unit: '瓶', count: 2 },
  { unit: '箱', count: 3 }, { unit: '箱', count: 4 },
  { unit: '盒', count: 5 }, { unit: '盒', count: 6 },
]

let allKeys = []
for (var value of list) {
  allKeys.push(value.unit)
}
const sameKeys = [...new Set(allKeys)]
console.log("🚀 ~ file: 1.jsx ~ line 12 ~ sameKeys", sameKeys)

const sameKeysCount = sameKeys.map(item => {
  return { unit: item, count: 0 }
})

for (var item of list) {
  const index = pros.findIndex((element) => element.unit === item.unit);
  sameKeysCount[index].count += item.count
}

console.log("🚀 ~ file: 1.jsx ~ line 17 ~ sameKeysCount", sameKeysCount)