8ee50178f3
Correct: `Array.from()` (it’s a static method) Incorrect: `Array.join()` (doesn’t exist; it’s a prototype method) This patch uses the common `#` syntax to denote `.prototype.`.
14 lines
339 B
Markdown
14 lines
339 B
Markdown
### similarity
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Returns an array of elements that appear in both arrays.
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Use `Array.prototype.filter()` to remove values that are not part of `values`, determined using `Array.prototype.includes()`.
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```js
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const similarity = (arr, values) => arr.filter(v => values.includes(v));
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```
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```js
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similarity([1, 2, 3], [1, 2, 4]); // [1, 2]
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```
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