rc-js-util
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A collection of TS and C++ utilities to help writing performant and correct applications, achieved through strict typing and (removable) invariant checking.
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[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [TExtractIndexes](./rc-js-util.textractindexes.md)
## TExtractIndexes type
Extract numerical indexes out of a type, if there aren't any fallback to number.
**Signature:**
```typescript
export type TExtractIndexes<T> = TNeverFallback<Extract<keyof T, number>, number>;
```
**References:** [TNeverFallback](./rc-js-util.tneverfallback.md)