rspec/rules/S1155/swift/rule.adoc

Using ``[Int]().count`` to test for emptiness works, but using ``[Int]().isEmpty`` makes the code more readable and can be more performant. The time complexity of any ``isEmpty`` implementation should be ``O(1)`` whereas some implementations of ``count()`` can be ``O(n)``.

== Noncompliant Code Example

----
if (arr.count == 0) {  // Noncompliant
  /* ... */
}
----

== Compliant Solution

----
if (arr.isEmpty) {
  /* ... */
}
----