Some work

helpers/number_helpers.go

@@ -21,7 +21,9 @@ THE SOFTWARE.
 */
 package helpers
 
-import "cmp"
+import (
+	"cmp"
+)
 
 const (
 	MaxUint = ^uint(0)
@@ -30,6 +32,18 @@ const (
 	MinInt  = -MaxInt - 1
 )
 
+func MaxFor[O interface{}, E cmp.Ordered](g func(O) E, of ...O) O {
+	var m O
+	var mE E
+	for i := range of {
+		if g(of[i]) > mE {
+			m = of[i]
+			mE = g(of[i])
+		}
+	}
+	return m
+}
+
 func Max[E cmp.Ordered](of ...E) E {
 	var m E
 	if len(of) > 0 {
@@ -43,6 +57,18 @@ func Max[E cmp.Ordered](of ...E) E {
 	return m
 }
 
+func MinFor[O interface{}, E cmp.Ordered](g func(O) E, of ...O) O {
+	var m O
+	var mE E
+	for i := range of {
+		if g(of[i]) < mE {
+			m = of[i]
+			mE = g(of[i])
+		}
+	}
+	return m
+}
+
 func Min[E cmp.Ordered](of ...E) E {
 	var m E
 	if len(of) > 0 {