fixdom random errors and bugs

cmd/playground/averageHeadFirstVariadic.go

@@ -14,7 +14,7 @@ func averageCalc(numbers ...float64) float64 {
 	return sum / float64(len(numbers))
 }
 
-func averageHeadFirstVariadic() {
+func main() {
 	arguments := os.Args[1:]
 	var numbers []float64
 	for _, argument := range arguments {
@@ -22,5 +22,5 @@ func averageHeadFirstVariadic() {
 		Error(err)
 		numbers = append(numbers, number)
 	}
-	fmt.Printf("Average: %0.2\n", averageCalc(numbers...))
+	fmt.Printf("Average: %0.2f\n", averageCalc(numbers...))
 }

cmd/playground/variadic.go

@@ -6,13 +6,13 @@ import (
 )
 
 func maximum(numbers ...float64) float64 {
-	max := math.Inf(-1)
+	maxNumber := math.Inf(-1)
 	for _, number := range numbers {
-		if number > max {
-			max = number
+		if number > maxNumber {
+			maxNumber = number
 		}
 	}
-	return max
+	return maxNumber
 }
 
 func inRange(min float64, max float64, numbers ...float64) []float64 {