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-1 is returned by findIndex() method when nothing is found.

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hjcasayas 2019-01-17 23:30:39 +08:00
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1-js/05-data-types/05-array-methods/article.md
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@ -305,7 +305,7 @@ In real life arrays of objects is a common thing, so the `find` method is very u
Note that in the example we provide to `find` the function `item => item.id == 1` with one argument. Other arguments of this function are rarely used.
The [arr.findIndex](mdn:js/Array/findIndex) method is essentially the same, but it returns the index where the element was found instead of the element itself and returns `-1` when nothing is found.
The [arr.findIndex](mdn:js/Array/findIndex) method is essentially the same, but it returns the index where the element was found instead of the element itself and `-1` is returned when nothing is found.
### filter