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feat: add which_max and which_min to retrieve extreme element indices

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Implement reflection-based WhichMax and WhichMin to dynamically find the index or key of the maximum/minimum element in slices, arrays, or maps. Functions validate orderability, handle empty collections, and dispatch via reflect.Kind. Expose as which_max and which_min GVal functions, with float64 type assertions for compatibility and preserved error handling.
This commit is contained in:
Eric Coissac
2026-06-02 14:37:39 +02:00
parent 14064c919e
commit 13a93fce11
2 changed files with 124 additions and 0 deletions
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pkg/obiseq/language.go
+14
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@@ -141,6 +141,20 @@ var OBILang = gval.NewLanguage(
gval.Function("max", func(args ...interface{}) (interface{}, error) {
return obiutils.Max(args[0])
}),
gval.Function("which_max", func(args ...interface{}) (interface{}, error) {
result, err := obiutils.WhichMax(args[0])
if idx, ok := result.(int); ok {
return float64(idx), nil
}
return result, err
}),
gval.Function("which_min", func(args ...interface{}) (interface{}, error) {
result, err := obiutils.WhichMin(args[0])
if idx, ok := result.(int); ok {
return float64(idx), nil
}
return result, err
}),
gval.Function("filtermin", func(args ...interface{}) (interface{}, error) {
return obiutils.FilterMin(args[0], args[1])