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Simplify unionBy

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Siarhei
2018-10-10 16:47:58 +04:00
parent e7b3518fe4
commit 8d558bf6fa
2 changed files with 2 additions and 2 deletions
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2
snippets/unionBy.md
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@ -8,7 +8,7 @@ Return the last set converted to an array.
```js ```js
const unionBy = (a, b, fn) => { const unionBy = (a, b, fn) => {
const s = new Set(a.map(v => fn(v))); const s = new Set(a.map(fn));
return Array.from(new Set([...a, ...b.filter(x => !s.has(fn(x)))])); return Array.from(new Set([...a, ...b.filter(x => !s.has(fn(x)))]));
}; };
``` ```

2
test/unionBy/unionBy.js
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@ -1,5 +1,5 @@
const unionBy = (a, b, fn) => { const unionBy = (a, b, fn) => {
const s = new Set(a.map(v => fn(v))); const s = new Set(a.map(fn));
return Array.from(new Set([...a, ...b.filter(x => !s.has(fn(x)))])); return Array.from(new Set([...a, ...b.filter(x => !s.has(fn(x)))]));
}; };
module.exports = unionBy; module.exports = unionBy;