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
439 B
Markdown
14 lines
439 B
Markdown
### differenceWith
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Filters out all values from an array for which the comparator function does not return `true`.
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Use `Array.prototype.filter()` and `Array.prototype.findIndex()` to find the appropriate values.
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```js
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const differenceWith = (arr, val, comp) => arr.filter(a => val.findIndex(b => comp(a, b)) === -1);
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```
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```js
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differenceWith([1, 1.2, 1.5, 3, 0], [1.9, 3, 0], (a, b) => Math.round(a) === Math.round(b)); // [1, 1.2]
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```
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