update day1

nicer struct names

2024/01/main.go

@@ -8,13 +8,13 @@ import (
 )
 
 type list struct {
-	a []int
-	b []int
+	left  []int
+	right []int
 }
 
 func main() {
 	list_a, list_b := helper.ReadLinesTwoIntSlices()
-	list := list{a: list_a, b: list_b}
+	list := list{left: list_a, right: list_b}
 
 	// part 1
 	distance := list.distance()
@@ -26,20 +26,22 @@ func main() {
 }
 
 func (l list) distance() (dist int) {
-	sort.Ints(l.a)
-	sort.Ints(l.b)
+	sort.Ints(l.left)
+	sort.Ints(l.right)
 
-	for i := range l.a {
-		dist += helper.Abs(l.a[i] - l.b[i])
+	for i := range l.left {
+		dist += helper.Abs(l.left[i] - l.right[i])
 	}
+
 	return dist
 }
 
 func (l list) similarity() (sim int) {
-	for _, val := range l.a {
-		valcount := countIntInSlice(l.b, val)
-		sim += valcount * val
+	for _, lval := range l.left {
+		valcount := countIntInSlice(l.right, lval)
+		sim += lval * valcount
 	}
+
 	return sim
 }
 
@@ -49,5 +51,6 @@ func countIntInSlice(lst []int, i int) (count int) {
 			count++
 		}
 	}
+
 	return count
 }