From 444b993d571d955b36aa0aa64cd03dd1a31761b3 Mon Sep 17 00:00:00 2001
From: Bill Barbour <bill.barbour@oracle.com>
Date: Tue, 8 May 2018 15:24:10 -0400
Subject: [PATCH] Updated number to be prime; and Swift 4 update

---
 Rabin-Karp/Rabin-Karp.playground/Contents.swift | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Rabin-Karp/Rabin-Karp.playground/Contents.swift b/Rabin-Karp/Rabin-Karp.playground/Contents.swift
index 739b74e2a..40cd176a6 100644
--- a/Rabin-Karp/Rabin-Karp.playground/Contents.swift
+++ b/Rabin-Karp/Rabin-Karp.playground/Contents.swift
@@ -8,7 +8,7 @@ print("Hello, Swift 4!")
 import UIKit
 
 struct Constants {
-    static let hashMultiplier = 69069
+    static let hashMultiplier = 69061
 }
 
 precedencegroup PowerPrecedence { higherThan: MultiplicationPrecedence }
@@ -30,8 +30,8 @@ extension Character {
 // Find first position of pattern in the text using Rabin Karp algorithm
 public func search(text: String, pattern: String) -> Int {
     // convert to array of ints
-    let patternArray = pattern.flatMap { $0.asInt }
-    let textArray = text.flatMap { $0.asInt }
+    let patternArray = pattern.compactMap { $0.asInt }
+    let textArray = text.compactMap { $0.asInt }
 
     if textArray.count < patternArray.count {
         return -1