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-rw-r--r--lib/metropolis/multi_hash/digest.rb12
1 files changed, 7 insertions, 5 deletions
diff --git a/lib/metropolis/multi_hash/digest.rb b/lib/metropolis/multi_hash/digest.rb
index 974d7ac..56264aa 100644
--- a/lib/metropolis/multi_hash/digest.rb
+++ b/lib/metropolis/multi_hash/digest.rb
@@ -1,23 +1,25 @@
 # -*- encoding: binary -*-
 require 'digest'
 module Metropolis::MultiHash::Digest
+  N = "N"
+
   def digest_sha1(key)
-    ::Digest::SHA1.digest(key)[0,4].unpack("N")[0]
+    ::Digest::SHA1.digest(key)[0,4].unpack(N)[0]
   end
 
   def digest_md5(key)
-    ::Digest::MD5.digest(key)[0,4].unpack("N")[0]
+    ::Digest::MD5.digest(key)[0,4].unpack(N)[0]
   end
 
   def digest_sha256(key)
-    ::Digest::SHA256.digest(key)[0,4].unpack("N")[0]
+    ::Digest::SHA256.digest(key)[0,4].unpack(N)[0]
   end
 
   def digest_sha384(key)
-    ::Digest::SHA384.digest(key)[0,4].unpack("N")[0]
+    ::Digest::SHA384.digest(key)[0,4].unpack(N)[0]
   end
 
   def digest_sha512(key)
-    ::Digest::SHA512.digest(key)[0,4].unpack("N")[0]
+    ::Digest::SHA512.digest(key)[0,4].unpack(N)[0]
   end
 end