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Robert Mennell
2018-01-08 13:27:45 -08:00
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### indexOfAll ### indexOfAll
Returns all indices of `val` in an array. If `val` never occurs, returns `[-1]`. Returns all indices of `val` in an array. If `val` never occurs, returns `[]`.
Use `Array.forEach()` to loop over elements and `Array.push()` to store indices for matching elements. Use `Array.forEach()` to loop over elements and `Array.push()` to store indices for matching elements.
Return `[-1]` if `length` of the array of indices is `0`, otherwise return the array of indices. Return the array of indices.
```js ```js
const indexOfAll = (arr, val) => { const indexOfAll = (arr, val) => {