Why freeze memoization?

rubyonrails-talk
1

I was wondering what was the reasoning behind freezing the Memoizable return values?

Thanks

2

to protect you from stuff like

foo = bar.memoized_method foo.gsub!(...) #do something with foo

If you did this and foo wasn't frozen then you'd alter what memoized_method returned for all future calls - probably not what was intended

Fred

3

Makes sense. Thanks.