javascript - 如何根据每个对象的分配百分比将项目分配给对象？

Question

我正在尝试创建以下内容:

我有一个包含 n 个项目的数组，随着添加更多项目，我希望将它们分配给每个对象，但要考虑每个对象中分配的百分比。

const items = []
const obj1 = {id: 1, allocationPercentage: 40, items: []}
const obj2 = {id: 2, allocationPercentage: 20, items: []}
const obj3 = {id: 3, allocationPercentage: 40, items: []}

如果我向数组添加 5 个项目，那么它看起来会像这样:

const items = ["item1", "item2", "item3", "item4", "item5"]

const obj1 = {id: 1, allocationPercentage: 40, items: ["item1", "item2"]}
const obj2 = {id: 2, allocationPercentage: 20, items: ["item3"]}
const obj3 = {id: 3, allocationPercentage: 40, items: ["item4", "item5"]}

每个对象中的分配百分比可能会有所不同。

Answer 1

const items = ["item1", "item2", "item3", "item4", "item5"]
const obj1 = {id: 1, allocationPercentage: 40, items: []}
const obj2 = {id: 2, allocationPercentage: 20, items: []}
const obj3 = {id: 3, allocationPercentage: 40, items: []}
// group objs in an array
const objs = [obj1, obj2, obj3]

let cursor = 0
for (const obj of objs) {
  // calculate number of items to add to the array per object
  const numberOfItems = Math.floor(obj.allocationPercentage / 100 * items.length)
  // get the items
  const itemsToAdd = items.slice(cursor, cursor + numberOfItems)
  // push them to the items
  obj.items.push(itemsToAdd)
  // remember to move the cursor
  cursor += numberOfItems
}

console.log(objs)