* Cache takes ownership of input data

The cache example now owns the data, and not static references, as mentioned in #48 Also variable names are modified to explain their usage.

* Update sync_example.rs

The cache example now owns the data, and not static references, as mentioned in #48 Also variable names are modified to explain their usage.

While reviewing the code I was a confused by the name num_entries which suggest an integer while actually a fractional number is used. Changing this to usize makes the function call 7 machine code instructions shorter and the function body longer 5 instructions longer (from 65 to 70, as checked by the compiler explorer https://godbolt.org/ ). So with improved code readability also 2 instructions less are needed.

…odifying field of interest (#52)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3.1.1 to 3.1.4.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v3.1.1...v3.1.4)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>