splitaddbothsidesarraytogether with test

Author: lpvm

splitaddbothsidesarraytogether/splitaddbothsidesarraytogether.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"fmt"
+)
+
+func sumArr(short, long []int) []int {
+	s := []int{}
+	longrev := []int{}
+	if len(long) > len(short) {
+		s = append(s, long[0])
+		longrev = long[1:]
+	} else {
+		longrev = long[:]
+	}
+	for i := 0; i < len(short); i++ {
+		s = append(s, short[i]+longrev[i])
+	}
+	return s
+}
+
+// SplitAndAdd is a function
+func SplitAndAdd(numbers []int, n int) []int {
+	if len(numbers) <= 1 || n == 0 {
+		return numbers
+	}
+
+	for {
+		n1 := numbers[0 : len(numbers)/2]
+		n2 := numbers[len(numbers)/2:]
+		numbers = []int{}
+		numbers = sumArr(n1, n2)
+		n--
+		if n == 0 || len(numbers) == 1 {
+			break
+		}
+	}
+	return numbers
+}
+
+func main() {
+
+	a := SplitAndAdd([]int{1, 2, 3, 4}, 1)
+	fmt.Println("end: ", a)
+}

splitaddbothsidesarraytogether/splitaddbothsidesarraytogether_test.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestSplitAndAdd(t *testing.T) {
+	s := SplitAndAdd([]int{1, 2, 3, 4, 5}, 2)
+	if !reflect.DeepEqual(s, []int{5, 10}) {
+		t.Errorf("SplitAndAdd was incorrect, got: %d, want %d.", s, []int{5, 10})
+	}
+
+	s = SplitAndAdd([]int{15}, 3)
+	if !reflect.DeepEqual(s, []int{15}) {
+		t.Errorf("SplitAndAdd was incorrect, got: %d, want %d.", s, []int{15})
+	}
+	s = SplitAndAdd([]int{1, 2, 3, 4}, 1)
+	if !reflect.DeepEqual(s, []int{4, 6}) {
+		t.Errorf("SplitAndAdd was incorrect, got: %d, want %d.", s, []int{4, 6})
+	}
+	s = SplitAndAdd([]int{1, 2, 3, 4, 5, 6}, 20)
+	if !reflect.DeepEqual(s, []int{21}) {
+		t.Errorf("SplitAndAdd was incorrect, got: %d, want %d.", s, []int{21})
+	}
+	s = SplitAndAdd([]int{32, 45, 43, 23, 54, 23, 54, 34}, 2)
+	if !reflect.DeepEqual(s, []int{183, 125}) {
+		t.Errorf("SplitAndAdd was incorrect, got: %d, want %d.", s, []int{183, 125})
+	}
+	s = SplitAndAdd([]int{32, 45, 43, 23, 54, 23, 54, 34}, 0)
+	if !reflect.DeepEqual(s, []int{32, 45, 43, 23, 54, 23, 54, 34}) {
+		t.Errorf("SplitAndAdd was incorrect, got: %d, want %d.", s, []int{32, 45, 43, 23, 54, 23, 54, 34})
+	}
+	// 	s = SplitAndAdd([]int{3, 234, 25, 345, 45, 34, 234, 235, 345}, 3)
+	// 	if !reflect.DeepEqual(s, []int{305, 1195}) {
+	// 		t.Errorf("SplitAndAdd was incorrect, got: %d, want %d.", s, []int{305, 1195})
+	// 	}
+	// 	s = SplitAndAdd([]int{3, 234, 25, 345, 45, 34, 234, 235, 345, 34, 534, 45, 645, 645, 645, 4656, 45, 3}, 4)
+	// 	if !reflect.DeepEqual(s, []int{1040, 7712}) {
+	// 		t.Errorf("SplitAndAdd was incorrect, got: %d, want %d.", s, []int{1040, 7712})
+	// 	}
+	// 	s = SplitAndAdd([]int{23, 345, 345, 345, 34536, 567, 568, 6, 34536, 54, 7546, 456}, 20)
+	// 	if !reflect.DeepEqual(s, []int{79327}) {
+	// 		t.Errorf("SplitAndAdd was incorrect, got: %d, want %d.", s, []int{79327})
+	// 	}
+}