| 7 | * @param cb The function to calculate uniqueness |
| 8 | */ |
| 9 | export function mergeBy<T>(arr1: T[], arr2: T[], cb: (element: T) => string): T[] { |
| 10 | const groupedArr1 = groupBy(arr1, cb) |
| 11 | const groupedArr2 = groupBy(arr2, cb) |
| 12 | const result: T[] = Object.values(groupedArr2).map((value) => value[value.length - 1]) |
| 13 | |
| 14 | const arr2Keys = Object.keys(groupedArr2) |
| 15 | Object.entries(groupedArr1).forEach(([key, value]) => { |
| 16 | if (!arr2Keys.includes(key)) { |
| 17 | result.push(value[value.length - 1]) |
| 18 | } |
| 19 | }) |
| 20 | |
| 21 | return result |
| 22 | } |
| 23 | |
| 24 | const groupBy = <T>(arr: T[], cb: (element: T) => string): { [key: string]: T[] } => { |
| 25 | return arr.reduce<{ [key: string]: T[] }>((acc, curr) => { |