Merge status and query player data (#7)

src/util.go

@@ -255,3 +255,25 @@ func SHA256(input string) string {
 func PointerOf[T any](v T) *T {
 	return &v
 }
+
+// Contains returns true if the array contains the value.
+func Contains[T comparable](arr []T, v T) bool {
+	for _, value := range arr {
+		if value == v {
+			return true
+		}
+	}
+
+	return false
+}
+
+// Map applies the provided map function to all of the values in the array and returns the result.
+func Map[I, O any](arr []I, f func(I) O) []O {
+	result := make([]O, len(arr))
+
+	for i, v := range arr {
+		result[i] = f(v)
+	}
+
+	return result
+}