feat: add app launch log page

backend/utils/math/math_util.go

@@ -0,0 +1,93 @@
+package mathutil
+
+import (
+	"math"
+	. "tinyrdm/backend/utils"
+)
+
+// MaxWithIndex 查找所有元素中的最大值
+func MaxWithIndex[T Hashable](items ...T) (T, int) {
+	selIndex := -1
+	for i, t := range items {
+		if selIndex < 0 {
+			selIndex = i
+		} else {
+			if t > items[selIndex] {
+				selIndex = i
+			}
+		}
+	}
+	return items[selIndex], selIndex
+}
+
+func Max[T Hashable](items ...T) T {
+	val, _ := MaxWithIndex(items...)
+	return val
+}
+
+// MinWithIndex 查找所有元素中的最小值
+func MinWithIndex[T Hashable](items ...T) (T, int) {
+	selIndex := -1
+	for i, t := range items {
+		if selIndex < 0 {
+			selIndex = i
+		} else {
+			if t < items[selIndex] {
+				selIndex = i
+			}
+		}
+	}
+	return items[selIndex], selIndex
+}
+
+func Min[T Hashable](items ...T) T {
+	val, _ := MinWithIndex(items...)
+	return val
+}
+
+// Clamp 返回限制在minVal和maxVal范围内的value
+func Clamp[T Hashable](value T, minVal T, maxVal T) T {
+	if minVal > maxVal {
+		minVal, maxVal = maxVal, minVal
+	}
+	if value < minVal {
+		value = minVal
+	} else if value > maxVal {
+		value = maxVal
+	}
+	return value
+}
+
+// Abs 计算绝对值
+func Abs[T SignedNumber](val T) T {
+	return T(math.Abs(float64(val)))
+}
+
+// Floor 向下取整
+func Floor[T SignedNumber | UnsignedNumber](val T) T {
+	return T(math.Floor(float64(val)))
+}
+
+// Ceil 向上取整
+func Ceil[T SignedNumber | UnsignedNumber](val T) T {
+	return T(math.Ceil(float64(val)))
+}
+
+// Round 四舍五入取整
+func Round[T SignedNumber | UnsignedNumber](val T) T {
+	return T(math.Round(float64(val)))
+}
+
+// Sum 计算所有元素总和
+func Sum[T SignedNumber | UnsignedNumber](items ...T) T {
+	var sum T
+	for _, item := range items {
+		sum += item
+	}
+	return sum
+}
+
+// Average 计算所有元素的平均值
+func Average[T SignedNumber | UnsignedNumber](items ...T) T {
+	return Sum(items...) / T(len(items))
+}