From 012a0b91252da7b3b23e679dd50a1571a59f5a21 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Sun, 25 Feb 2024 13:06:04 +0900
Subject: [PATCH] [ruby/resolv] Simplify adding new entries

https://github.com/ruby/resolv/commit/081b8df705
---
 lib/resolv.rb | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/lib/resolv.rb b/lib/resolv.rb
index 54e8a6feb483d2..1363d49dc45017 100644
--- a/lib/resolv.rb
+++ b/lib/resolv.rb
@@ -196,12 +196,8 @@ def lazy_initialize # :nodoc:
               line.sub!(/#.*/, '')
               addr, *hostnames = line.split(/\s+/)
               next unless addr
-              @addr2name[addr] = [] unless @addr2name.include? addr
-              @addr2name[addr].concat(hostnames)
-              hostnames.each {|hostname|
-                @name2addr[hostname] = [] unless @name2addr.include? hostname
-                @name2addr[hostname] << addr
-              }
+              (@addr2name[addr] ||= []).concat(hostnames)
+              hostnames.each {|hostname| (@name2addr[hostname] ||= []) << addr}
             }
           }
           @name2addr.each {|name, arr| arr.reverse!}