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