From eeca6ec8f511933e9a403e6b6166b874eead25b1 Mon Sep 17 00:00:00 2001
From: ksss <co000ri@gmail.com>
Date: Wed, 4 Jan 2017 14:00:28 +0900
Subject: Rewrite String#prepend with Ruby

Fix #3357
---
 mrbgems/mruby-string-ext/mrblib/string.rb | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'mrbgems/mruby-string-ext/mrblib/string.rb')

diff --git a/mrbgems/mruby-string-ext/mrblib/string.rb b/mrbgems/mruby-string-ext/mrblib/string.rb
index e6fbe7ddc..6e5f3c73d 100644
--- a/mrbgems/mruby-string-ext/mrblib/string.rb
+++ b/mrbgems/mruby-string-ext/mrblib/string.rb
@@ -385,4 +385,18 @@ class String
     end
   end
   alias each_codepoint codepoints
+
+  ##
+  # call-seq:
+  #    str.prepend(other_str)  -> str
+  #
+  # Prepend---Prepend the given string to <i>str</i>.
+  #
+  #    a = "world"
+  #    a.prepend("hello ") #=> "hello world"
+  #    a                   #=> "hello world"
+  def prepend(arg)
+    self[0, 0] = arg
+    self
+  end
 end
-- 
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