From c9e459edac8d50e12b22a5ead5de6f4dfec29598 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mike=20Schw=C3=B6rer?= <pubgit@mikescher.com>
Date: Thu, 27 Oct 2022 17:03:30 +0200
Subject: [PATCH] Add mathext.Min / mathext.Max

---
 langext/generics.go   | 28 ++++++++++++++++++++++++++++
 mathext/math.go       | 18 ++++++++++++++++++
 mathext/statistics.go | 18 ++++++++++--------
 3 files changed, 56 insertions(+), 8 deletions(-)

diff --git a/langext/generics.go b/langext/generics.go
index e295033..8004d8e 100644
--- a/langext/generics.go
+++ b/langext/generics.go
@@ -3,3 +3,31 @@ package langext
 type IntConstraint interface {
 	int | int8 | int16 | int32 | int64 | uint | uint8 | uint16 | uint32 | uint64
 }
+
+type SignedConstraint interface {
+	~int | ~int8 | ~int16 | ~int32 | ~int64
+}
+
+type UnsignedConstraint interface {
+	~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 | ~uintptr
+}
+
+type IntegerConstraint interface {
+	SignedConstraint | UnsignedConstraint
+}
+
+type FloatConstraint interface {
+	~float32 | ~float64
+}
+
+type ComplexConstraint interface {
+	~complex64 | ~complex128
+}
+
+type OrderedConstraint interface {
+	IntegerConstraint | FloatConstraint | ~string
+}
+
+type NumberConstraint interface {
+	IntegerConstraint | FloatConstraint
+}
diff --git a/mathext/math.go b/mathext/math.go
index bf71435..3cf7651 100644
--- a/mathext/math.go
+++ b/mathext/math.go
@@ -1,5 +1,7 @@
 package mathext
 
+import "gogs.mikescher.com/BlackForestBytes/goext/langext"
+
 func AvgFloat64(arr []float64) float64 {
 	return SumFloat64(arr) / float64(len(arr))
 }
@@ -11,3 +13,19 @@ func SumFloat64(arr []float64) float64 {
 	}
 	return sum
 }
+
+func Max[T langext.OrderedConstraint](v1 T, v2 T) T {
+	if v1 > v2 {
+		return v1
+	} else {
+		return v2
+	}
+}
+
+func Min[T langext.OrderedConstraint](v1 T, v2 T) T {
+	if v1 < v2 {
+		return v1
+	} else {
+		return v2
+	}
+}
diff --git a/mathext/statistics.go b/mathext/statistics.go
index bceed45..52216c7 100644
--- a/mathext/statistics.go
+++ b/mathext/statistics.go
@@ -1,26 +1,28 @@
 package mathext
 
-func Sum(v []float64) float64 {
-	total := float64(0)
+import "gogs.mikescher.com/BlackForestBytes/goext/langext"
+
+func Sum[T langext.NumberConstraint](v []T) T {
+	total := T(0)
 	for _, v := range v {
 		total += v
 	}
 	return total
 }
 
-func Mean(v []float64) float64 {
-	return Sum(v) / float64(len(v))
+func Mean[T langext.FloatConstraint](v []T) T {
+	return Sum(v) / T(len(v))
 }
 
-func Median(v []float64) float64 {
+func Median[T langext.FloatConstraint](v []T) T {
 	if len(v)%2 == 1 {
 		return v[len(v)/2]
 	} else {
-		return (v[len(v)/2-1] + v[len(v)/2]) / float64(2)
+		return (v[len(v)/2-1] + v[len(v)/2]) / T(2)
 	}
 }
 
-func Min(v []float64) float64 {
+func ArrMin[T langext.OrderedConstraint](v []T) T {
 	r := v[0]
 	for _, val := range v {
 		if val < r {
@@ -30,7 +32,7 @@ func Min(v []float64) float64 {
 	return r
 }
 
-func Max(v []float64) float64 {
+func ArrMax[T langext.OrderedConstraint](v []T) T {
 	r := v[0]
 	for _, val := range v {
 		if val > r {