assign comparator functions to variables for readability

day-02/internal/one/check.go

@@ -2,7 +2,7 @@ package one
 
 import "math"
 
-func checkWithComparator(nums []int, comparator comparator) bool {
+func check(nums []int, comparator comparator) bool {
 	for i := 1; i < len(nums); i++ {
 		if comparator(nums, i) || !isSafe(nums[i-1], nums[i]) {
 			return false

day-02/internal/one/check_internal_test.go

@@ -31,7 +31,7 @@ func TestCheckIncreased(t *testing.T) {
 
 	for name, tc := range tt {
 		t.Run(name, func(t *testing.T) {
-			got := checkWithComparator(tc.input, cmp)
+			got := check(tc.input, cmp)
 			assert.Equal(t, tc.want, got)
 		})
 	}
@@ -62,7 +62,7 @@ func TestCheckDecreased(t *testing.T) {
 
 	for name, tc := range tt {
 		t.Run(name, func(t *testing.T) {
-			got := checkWithComparator(tc.input, cmp)
+			got := check(tc.input, cmp)
 			assert.Equal(t, tc.want, got)
 		})
 	}

day-02/internal/one/solve.go

@@ -23,18 +23,18 @@ func parseLines(r io.Reader) int {
 	scanner := bufio.NewScanner(r)
 	for scanner.Scan() {
 		nums := util.IntsFromString(scanner.Text())
-		if check(checkWithComparator, nums, func(nums []int, i int) bool {
+
+		cmpIncrease := func(nums []int, i int) bool {
 			return nums[i-1] >= nums[i]
-		}) || check(checkWithComparator, nums, func(nums []int, i int) bool {
+		}
+		cmpDecrease := func(nums []int, i int) bool {
 			return nums[i-1] <= nums[i]
-		}) {
+		}
+
+		if check(nums, cmpIncrease) || check(nums, cmpDecrease) {
 			sum++
 		}
 	}
 
 	return sum
 }
-
-func check(fn func([]int, comparator) bool, nums []int, comparator comparator) bool {
-	return fn(nums, comparator)
-}