Init

pkg/common/common.go

@@ -0,0 +1,122 @@
+package common
+
+import (
+	"math"
+	"time"
+)
+
+// Min or max (time.Duration datatype.)
+func MinMaxTimeDuration(array []time.Duration) (time.Duration, time.Duration) {
+	if len(array) == 0 {
+		return 0 * time.Microsecond, 0 * time.Microsecond
+	} else {
+		var max time.Duration = array[0]
+		var min time.Duration = array[0]
+
+		for j := 1; j < len(array); j++ {
+			value := array[j]
+			if max < value {
+				max = value
+			}
+			if min > value {
+				min = value
+			}
+		}
+		return min, max
+	}
+}
+
+// Sum (time.Duration datatype.)
+func SumTimeDuration(array []time.Duration) time.Duration {
+	var result time.Duration = 0 * time.Microsecond
+	for _, v := range array {
+		result += v
+	}
+
+	return result
+}
+
+// Mean (time.Duration datatype.)
+func MeanTimeDuration(array []time.Duration) time.Duration {
+	sumArr := float64(SumTimeDuration(array)/time.Microsecond) / float64(len(array))
+
+	return time.Duration(sumArr) * time.Microsecond
+}
+
+// stdDev (time.Duration datatype.)
+func StdDevTimeDuration(array []time.Duration) time.Duration {
+
+	square := float64(0)
+
+	for j := 1; j < len(array); j++ {
+		square += float64((array[j]-MeanTimeDuration(array))/time.Microsecond) * float64((array[j]-MeanTimeDuration(array))/time.Microsecond)
+	}
+
+	return time.Duration(math.Sqrt(square/float64(len(array)))) * time.Microsecond
+}
+
+// Min or max function (int datatype.)
+func MinMax(array []int) (int, int) {
+	if len(array) == 0 {
+		return 0, 0
+	} else {
+		var max int = array[0]
+		var min int = array[0]
+		for _, value := range array {
+			if max < value {
+				max = value
+			}
+			if min > value {
+				min = value
+			}
+		}
+		return min, max
+	}
+}
+
+// Sum (int datatype.)
+func Sum(array []int) int {
+	var result int = 0
+	for _, v := range array {
+		result += v
+	}
+
+	return result
+}
+
+// Mean (float64 datatype.)
+func Mean(array []int) float64 {
+	if len(array) == 0 {
+		return 0.0
+	} else {
+		sumArr := float64(Sum(array)) / float64(len(array))
+
+		return float64(sumArr)
+	}
+}
+
+// stdDev (float64 datatype.)
+func StdDev(array []int) float64 {
+	if len(array) == 0 {
+		return 0.0
+	} else {
+		square := float64(0)
+
+		for _, v := range array {
+			square += (float64(v) - Mean(array)) * (float64(v) - Mean(array))
+		}
+
+		return math.Sqrt(square / float64(len(array)))
+	}
+}
+
+// Takes a slice and looks for an element in it. If found it will
+// return it's key, otherwise it will return -1 and a bool of false.
+func IfPresentInSlice(slice []int, val int) (int, bool) {
+	for i, item := range slice {
+		if item == val {
+			return i, true
+		}
+	}
+	return -1, false
+}