Finds last index of a value.
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> Alternatives: [searchValue], [searchValueRight], [searchValueAll].
> Similar: [search], [scan], [find].
> This is part of package [extra-array].
[extra-array]: https://www.npmjs.com/package/extra-array
```javascript
array.searchValueRight(x, v, [fc], [fm]);
// x: an array
// v: search value
// fc: compare function (a, b)
// fm: map function (v, i, x)
// → index of value, -1 if not found
```
```javascript
const array = require("extra-array");
var x = [1, 2, 3, 2, 5];
array.searchValueRight(x, 2);
// 3 ^
var x = [1, 2, 3, -2, 5];
array.searchValueRight(x, 2, (a, b) => Math.abs(a) - Math.abs(b));
// 3 ^
array.searchValueRight(x, 2, null, v => Math.abs(v));
// 3 ^
```
## References
- [List-Extra.elemIndex: elm](https://package.elm-lang.org/packages/elm-community/list-extra/7.1.0/List-Extra#elemIndex)
- [iterable-binsearch: @krisselden](https://www.npmjs.com/package/iterable-binsearch)
- [binarysearch: @soldair](https://www.npmjs.com/package/binarysearch)
[searchValue]: https://github.com/nodef/extra-array/wiki/searchValue
[searchValueRight]: https://github.com/nodef/extra-array/wiki/searchValueRight
[searchValueAll]: https://github.com/nodef/extra-array/wiki/searchValueAll
[search]: https://github.com/nodef/extra-array/wiki/search
[scan]: https://github.com/nodef/extra-array/wiki/scan
[find]: https://github.com/nodef/extra-array/wiki/find