1 files changed, 17 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/string/iterators.rb b/activesupport/lib/active_support/core_ext/string/iterators.rb
new file mode 100644
index 0000000000..73114d9d5f
--- /dev/null
+++ b/activesupport/lib/active_support/core_ext/string/iterators.rb
@@ -0,0 +1,17 @@
+require 'strscan'
+
+module ActiveSupport #:nodoc:
+  module CoreExtensions #:nodoc:
+    module String #:nodoc:
+      # Custom string iterators
+      module Iterators
+        # Yields a single-character string for each character in the string.
+        # When $KCODE = 'UTF8', multi-byte characters are yielded appropriately.
+        def each_char
+          scanner, char = StringScanner.new(self), /./mu
+          loop { yield(scanner.scan(char) || break) }
+        end
+      end
+    end
+  end
+end