18 lines
435 B
Markdown
18 lines
435 B
Markdown
### symmetricDifference
|
|
|
|
Returns the symmetric difference between two arrays.
|
|
|
|
Create a `Set` from each array, then use `Array.filter()` on each of them to only keep values not contained in the other.
|
|
|
|
```js
|
|
const symmetricDifference = (a, b) => {
|
|
const sA = new Set(a),
|
|
sB = new Set(b);
|
|
return [...a.filter(x => !sB.has(x)), ...b.filter(x => !sA.has(x))];
|
|
};
|
|
```
|
|
|
|
```js
|
|
symmetricDifference([1, 2, 3], [1, 2, 4]); // [3,4]
|
|
```
|