Start ArticleArray.swift.

Evergreen/MainWindow/Timeline/ArticleArray.swift

@@ -0,0 +1,22 @@
+//
+//  ArticleArray.swift
+//  Evergreen
+//
+//  Created by Brent Simmons on 11/1/17.
+//  Copyright © 2017 Ranchero Software. All rights reserved.
+//
+
+import Foundation
+import Data
+
+extension Array where Element == Article {
+
+	func articleAtRow(_ row: Int) -> Article? {
+
+		if row < 0 || row == NSNotFound || row > count - 1 {
+			return nil
+		}
+		return self[row]
+	}
+
+}