Function unionBy

unionBy<T>(arrays: T[][], iteratee: (v: T) => any): T[]
Similar to union, but uses an iteratee function to determine uniqueness.
Type Parameters
- T
Parameters
- arrays: T[][]
  Arrays to combine
- iteratee: (v: T) => any
  Function to compute uniqueness
Returns T[]
Array of unique values based on iteratee
Example
```
unionBy([{x:1}], [{x:2}], o => o.x); // [{x:1}, {x:2}]
```
Since
1.2.0
- Defined in array/unionBy.ts:14