Add functions: FindEx and FindLastEx

[tiendc]

No description provided.

[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.28%. Comparing base (1ad9ac4) to head (af15ca6).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #100   +/-   ##
=======================================
  Coverage   99.28%   99.28%           
=======================================
  Files          21       21           
  Lines        2092     2104   +12     
=======================================
+ Hits         2077     2089   +12     
  Misses         11       11           
  Partials        4        4           

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