diffArray

diffArray<T>(left, right, matchFn?): Object

2つの配列でそれぞれにのみ存在する要素、両方に存在する要素を分けたものを返却

Example

// --- [例1] 文字列と数値を要素にとる配列 --- //
const { leftOnlyItems, rightOnlyItems, bothItems } = diffArray([1, 2, 3, '4', '5'], ['1', '2', 3, 4, 5])
// leftOnlyItems => [1, 2, '4', '5']
// rightOnlyItems => ['1', '2', 4, 5]
// bothItems => [3]

// --- [例1] 任意のオブジェクトを要素にとる配列 --- //
const left: Array<Test> = [
  { id: 1, value: 'test1' },
  { id: 2, value: 'test2' },
  { id: 3, value: 'test3' },
]
const right: Array<Test> = [
  { id: 3, value: 'test3' },
  { id: 4, value: 'test4' },
  { id: 5, value: 'test5' },
]
const { leftOnlyItems, rightOnlyItems, bothItems } = diffArray(left, right, (a, b) => a.id === b.id && a.value === b.value)
// leftOnlyItems => [{ id: 1, value: 'test1' }, { id: 2, value: 'test2' }]
// rightOnlyItems => [{ id: 4, value: 'test4' }, { id: 5, value: 'test5' }]
// bothItems => [{ id: 3, value: 'test3' }]

Type

Name
T

Parameters

Name	Type	Description
left	T[]
right	T[]
matchFn	(a: T, b: T) => boolean	要素一致を評価する関数（一致する場合はTrueを返却する）

Returns

Object

Name	Type
bothItems	T[]
leftOnlyItems	T[]
rightOnlyItems	T[]