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TS-如何从旧阵列和新阵列中获取阵列中删除和添加的项?

typescript arrays

-1

Shift 'n Tab · 技术社区 · 9 年前

我们应该有这个

oldArray = [
    { id: 1, position: 'DEV OM'},
    { id: 2, position: 'Senior Developer'},
]

newArray = [
    { id: 2, position: 'Senior Developer'},
    { id: 3, position: 'Junior Developer'},
]

addedItems = getAddedItems(oldArray, newArray)
removedItems = getRemovedItems(oldArray, newArray)


// Output for addedItems
[
    { id: 3, position: 'Junior Developer'}
]

// Output for removedItems
[
    { id: 1, position: 'DEV OM'}
]

1 回复 | 直到 9 年前

1

2

Pablo Lozano 9 年前

您需要一个函数来查找两个数组之间的差异:

let oldArray = [
    { id: 1, position: 'DEV OM'},
    { id: 2, position: 'Senior Developer'}
]

let newArray = [
    { id: 2, position: 'Senior Developer'},
    { id: 3, position: 'Junior Developer'}
]

function difference(a,b) {
  return a.filter(itema => !b.some(itemb => itemb.id===itema.id));
}

console.log(difference(oldArray,newArray))
console.log(difference(newArray,oldArray))