Hash string to symbol

Rails
1

I found a method to convert the keys that are string to symbols. I
included the file in the lib directory but when I call it it says it
does not recognize the method. Ideas?

class Hash

Recursively replace key names that should be symbols with symbols.

def key_strings_to_symbols!
r = Hash.new
self.each_pair do |k,v|
if ((k.kind_of? String) and k =~ /^:/)
v.key_strings_to_symbols! if v.kind_of? Hash and
v.respond_to? :key_strings_to_symbols!
r[k.slice(1…-1).to_sym] = v
else
v.key_strings_to_symbols! if v.kind_of? Hash and
v.respond_to? :key_strings_to_symbols!
r[k] = v
end
end
self.replace®
end
end

2

On Apr 5, 2010, at 7:36 PM, Me wrote:

   v.key_strings_to_symbols! if v.kind_of? Hash and

end
why not use what Rails already provides via symbolize_keys! …

http://api.rubyonrails.org/classes/ActiveSupport/CoreExtensions/Hash/Keys.html

3

Have you included the lib file in your class like
include Hash or
require ‘hash.rb’

If include is present then call the method like
object.key_strings_to_symbols!

If require is present then call the method like
class_name = Student
class_name.key_strings_to_symbols!

Keep rocking!

Chris H. wrote:

I found a method to convert the keys that are string to symbols. I
included the file in the lib directory but when I call it it says it
does not recognize the method. Ideas?

class Hash

Recursively replace key names that should be symbols with symbols.

def key_strings_to_symbols!
r = Hash.new
self.each_pair do |k,v|
if ((k.kind_of? String) and k =~ /^:/)
v.key_strings_to_symbols! if v.kind_of? Hash and
v.respond_to? :key_strings_to_symbols!
r[k.slice(1…-1).to_sym] = v
else
v.key_strings_to_symbols! if v.kind_of? Hash and
v.respond_to? :key_strings_to_symbols!
r[k] = v
end
end
self.replace®
end
end