[PWGLF] Add EventRecoEfficiency Study and Ngen Study in hStrangeCorrelation.cxx

[kcui1]

No description provided.

[github-actions]

O2 linter results: ❌ 0 errors, ⚠️ 15 warnings, 🔕 0 disabled

[alibuild]

Error while checking build/O2Physics/code-check for efada55 at 2026-10-07 12:56:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'Found 2 errors and 70 warnings.'
Found 2 errors and 70 warnings.
++ [[ 2 -gt 0 ]]
++ cat /sw/BUILD/fd478f9f6fb0a5ccb11eac771af6a17a9a4277d8/O2Physics-code-check/errors.txt
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:884:5: error: Variable 'radius' with floating point type 'double' should not be used as a loop counter [clang-analyzer-security.FloatLoopCounter,-warnings-as-errors]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:1260:5: error: Variable 'r' with floating point type 'double' should not be used as a loop counter [clang-analyzer-security.FloatLoopCounter,-warnings-as-errors]
++ [[ 70 -gt 0 ]]
++ cat /sw/BUILD/fd478f9f6fb0a5ccb11eac771af6a17a9a4277d8/O2Physics-code-check/warnings.txt
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:99:8: warning: constructor does not initialize these fields: ccdb, pdgDB [cppcoreguidelines-pro-type-member-init]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:1713:75: warning: use designated initializer list to initialize 'PairLossPairKey' [modernize-use-designated-initializers]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:3453:9: warning: the 'empty' method should be used to check for emptiness instead of comparing to an empty object [readability-container-size-empty]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:3642:9: warning: the 'empty' method should be used to check for emptiness instead of 'size' [readability-container-size-empty]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:3887:9: warning: the 'empty' method should be used to check for emptiness instead of 'size' [readability-container-size-empty]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:3927:9: warning: the 'empty' method should be used to check for emptiness instead of 'size' [readability-container-size-empty]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4082:9: warning: the 'empty' method should be used to check for emptiness instead of 'size' [readability-container-size-empty]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4167:11: warning: the 'empty' method should be used to check for emptiness instead of 'size' [readability-container-size-empty]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4224:13: warning: the 'empty' method should be used to check for emptiness instead of 'size' [readability-container-size-empty]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4283:13: warning: the 'empty' method should be used to check for emptiness instead of 'size' [readability-container-size-empty]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4333:11: warning: the 'empty' method should be used to check for emptiness instead of 'size' [readability-container-size-empty]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4446:13: warning: the 'empty' method should be used to check for emptiness instead of 'size' [readability-container-size-empty]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4476:9: warning: the 'empty' method should be used to check for emptiness instead of 'size' [readability-container-size-empty]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4739:15: warning: boolean expression can be simplified by DeMorgan's theorem [readability-simplify-boolean-expr]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4741:41: warning: use 'contains' to check for membership [readability-container-contains]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4750:30: warning: redundant explicit casting to the same type 'int64_t' (aka 'long') as the sub-expression, remove this casting [readability-redundant-casting]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4751:57: warning: redundant explicit casting to the same type 'int64_t' (aka 'long') as the sub-expression, remove this casting [readability-redundant-casting]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4752:56: warning: use 'contains' to check for membership [readability-container-contains]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4785:36: warning: use 'contains' to check for membership [readability-container-contains]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4794:28: warning: redundant explicit casting to the same type 'int64_t' (aka 'long') as the sub-expression, remove this casting [readability-redundant-casting]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4796:51: warning: use 'contains' to check for membership [readability-container-contains]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4872:15: warning: boolean expression can be simplified by DeMorgan's theorem [readability-simplify-boolean-expr]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4874:30: warning: redundant explicit casting to the same type 'int64_t' (aka 'long') as the sub-expression, remove this casting [readability-redundant-casting]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4888:26: warning: redundant explicit casting to the same type 'int64_t' (aka 'long') as the sub-expression, remove this casting [readability-redundant-casting]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4899:28: warning: redundant explicit casting to the same type 'int64_t' (aka 'long') as the sub-expression, remove this casting [readability-redundant-casting]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4983:13: warning: the 'empty' method should be used to check for emptiness instead of 'size' [readability-container-size-empty]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:4987:31: warning: the 'empty' method should be used to check for emptiness instead of 'size' [readability-container-size-empty]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:5112:26: warning: redundant explicit casting to the same type 'int64_t' (aka 'long') as the sub-expression, remove this casting [readability-redundant-casting]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:5113:30: warning: redundant explicit casting to the same type 'int64_t' (aka 'long') as the sub-expression, remove this casting [readability-redundant-casting]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:5114:30: warning: redundant explicit casting to the same type 'int64_t' (aka 'long') as the sub-expression, remove this casting [readability-redundant-casting]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:5139:32: warning: use 'contains' to check for membership [readability-container-contains]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:5192:61: warning: use designated initializer list to initialize 'PairLossFinalRecord' [modernize-use-designated-initializers]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:5193:32: warning: use designated initializer list to initialize 'PairLossPairKey' [modernize-use-designated-initializers]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:5267:13: warning: the 'empty' method should be used to check for emptiness instead of 'size' [readability-container-size-empty]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:5362:26: warning: redundant explicit casting to the same type 'int64_t' (aka 'long') as the sub-expression, remove this casting [readability-redundant-casting]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:5376:11: warning: redundant explicit casting to the same type 'int64_t' (aka 'long') as the sub-expression, remove this casting [readability-redundant-casting]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:5410:26: warning: redundant explicit casting to the same type 'int64_t' (aka 'long') as the sub-expression, remove this casting [readability-redundant-casting]
PWGLF/Tasks/Strangeness/hStrangeCorrelation.cxx:5427:15: warning: use auto when initializing with a cast to avoid duplicating the type name [modernize-use-auto]
[0 more errors; see full log]

Full log here.

[vkucera]

Hi @kcui1 , please consider fixing the existing errors.