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minor fixes

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This commit is contained in:
Ilya Kantor 2022-06-13 23:49:14 +02:00
parent c028189aba
commit bebcbfa134
1 changed files with 3 additions and 2 deletions
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1-js/05-data-types/05-array-methods/article.md
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@ -260,14 +260,15 @@ Note that the methods use `===` comparison. So, if we look for `false`, it finds
If we want to check for inclusion, and don't want to know the exact index, then `arr.includes` is preferred.
Also, a very minor difference of `includes` is that it correctly handles `NaN`, unlike `indexOf/lastIndexOf`:
Also, a minor, but noteworthy feature of `includes` is that it correctly handles `NaN`, unlike `indexOf/lastIndexOf`:
```js run
const arr = [NaN];
alert( arr.indexOf(NaN) ); // -1 (should be 0, but === equality doesn't work for NaN)
alert( arr.indexOf(NaN) ); // -1 (should be 0, but equality test === doesn't work for NaN)
alert( arr.includes(NaN) );// true (correct)
```
### find and findIndex
Imagine we have an array of objects. How do we find an object with the specific condition?