1  extension Array {
 2      /// Creates an empty array with the given capacity.
 3      ///
 4      /// It will be empty (i.e. `count == 0`), but the array will be able have at
 5      /// least `capacity` elements inserted into it without reallocating.
 6      ///
 7      /// This API should be used with care. You should know that you will
 8      /// actually fill the array with precisely this number of elements.
 9      ///
10      @inlinable
11      @inline(__always)
12      public init(capacity: Int) {
13          self.init(unsafeUninitializedCapacity: capacity) { _, initializedCount in
14              initializedCount = 0
15          }
16      }
17  }