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feat: add min/max filtering and saturating subtraction utilities

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Introduce generic and reflection-based utilities for filtering slices and maps by minimum/maximum thresholds, along with saturating subtraction. The `obiutils` package provides type-safe generic implementations alongside dynamic reflection dispatchers to handle arbitrary ordered and numeric types. These are exposed as GVAL expression functions in `obiseq`, extending the language's built-in filtering and numeric capabilities.
This commit is contained in:
Eric Coissac
2026-05-14 20:57:05 +08:00
parent a186bd1c92
commit cecf90fa40
2 changed files with 254 additions and 0 deletions
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pkg/obiseq/language.go
+13
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@@ -141,6 +141,19 @@ var OBILang = gval.NewLanguage(
gval.Function("max", func(args ...interface{}) (interface{}, error) {
return obiutils.Max(args[0])
}),
gval.Function("filtermin", func(args ...interface{}) (interface{}, error) {
return obiutils.FilterMin(args[0], args[1])
}),
gval.Function("filtermax", func(args ...interface{}) (interface{}, error) {
return obiutils.FilterMax(args[0], args[1])
}),
gval.Function("saturatingsub", func(args ...interface{}) (interface{}, error) {
return obiutils.SaturatingSub(args[0], args[1])
}),
gval.Function("contains", func(args ...interface{}) (interface{}, error) {
if obiutils.IsAMap(args[0]) {
val := reflect.ValueOf(args[0]).MapIndex(reflect.ValueOf(args[1]))