Function union

union<T>(a: readonly T[], b: readonly T[]): T[]
Union two arrays

两个数组的并集
Type Parameters
- T
  The type of elements in the array / 数组元素的类型
Parameters
- a: readonly T[]
  The first array to union. 第一个数组
- b: readonly T[]
  The second array to union. 第二个数组
Returns T[]
A new array containing unique elements from both arrays. 包含两个数组中唯一元素的新数组
Example
```
union([1, 2, 3], [2, 4, 5, 6]) // => [1, 2, 3, 4, 5, 6]
union([1, 2], [3, 4]) // => [1, 2, 3, 4]
```
- Defined in src/array/union.ts:21