Day 1: Simplify Rust and Go solutions

2019/1/day1.go

@@ -11,26 +11,20 @@ func main() {
 	inFile, _ := ioutil.ReadFile("input")
 	lines := strings.Split(string(inFile), "\n")
 
-	fmt.Printf("Part 1: %d\n", part1(lines))
-	fmt.Printf("Part 2: %d\n", part2(lines))
+	part1, part2 := solve(lines)
+	fmt.Printf("Part 1: %d\n", part1)
+	fmt.Printf("Part 2: %d\n", part2)
 }
 
-func part1(lines []string) int {
+func solve(lines []string) (int, int) {
 	fuel := 0
+	fuelRec := 0
 	for _, line := range lines {
 		mass, _ := strconv.Atoi(line)
 		fuel += cost(mass)
+		fuelRec += costRec(mass, 0)
 	}
-	return fuel
-}
-
-func part2(lines []string) int {
-	fuel := 0
-	for _, line := range lines {
-		mass, _ := strconv.Atoi(line)
-		fuel += costRec(mass, 0)
-	}
-	return fuel
+	return fuel, fuelRec
 }
 
 func cost(mass int) int {

2019/1/day1.rs

@@ -24,9 +24,8 @@ fn cost(mass: u32) -> u32 {
 }
 
 fn cost_rec(mass: u32, acc: u32) -> u32 {
-    let c = cost(mass);
-    match c {
+    match cost(mass) {
         0 => acc,
-        _ => cost_rec(c, acc + c)
+        c => cost_rec(c, acc + c)
     }
 }