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-rw-r--r--activesupport/lib/active_support/inflector/methods.rb6
1 files changed, 4 insertions, 2 deletions
diff --git a/activesupport/lib/active_support/inflector/methods.rb b/activesupport/lib/active_support/inflector/methods.rb
index 3fbc19ddf8..f94e12e14f 100644
--- a/activesupport/lib/active_support/inflector/methods.rb
+++ b/activesupport/lib/active_support/inflector/methods.rb
@@ -142,9 +142,11 @@ module ActiveSupport
# Converts just the first character to uppercase.
#
- # 'what a Lovely Day'.upcase_first # => "What a Lovely Day"
+ # upcase_first('what a Lovely Day') # => "What a Lovely Day"
+ # upcase_first('w') # => "W"
+ # upcase_first('') # => ""
def upcase_first(string)
- string[0].upcase.concat(string[1..-1])
+ string.length > 0 ? string[0].upcase.concat(string[1..-1]) : ''
end
# Capitalizes all the words and replaces some characters in the string to