Thanks! I will check fiddle out and post if I have any questions. It can 
call .dylib?

Liz

On Tuesday, July 15, 2014 2:46:35 PM UTC-4, Matt Jones wrote:
>
>
>
> On Monday, 14 July 2014 15:49:51 UTC-4, Liz Huang wrote:
>>
>>
>>
>> I don't see anything else though, let me copy the whole page:
>>
>>  LoadError in SamplesizeController#compute cannot load such file -- dl 
>>  Extracted source (around line *#14*): 
>>   
>> 121314151617
>>           
>>    def compute
>>     require 'dl'
>>     require 'pathname'
>> #    if ( session[:sigma_sq] <= 0.0 )
>>
>>    Rails.root: /Library/WebServer/smart
>>  Application Trace <http://localhost:3000/samplesize/compute#> | Framework 
>> Trace <http://localhost:3000/samplesize/compute#> | Full Trace 
>> <http://localhost:3000/samplesize/compute#> 
>>
>> app/controllers/samplesize_controller.rb:14:in `compute'
>>
>>  This error occurred while loading the following files:
>>    dl
>>
>>
>>>
> DL was deprecated in Ruby 2.0 and removed in 2.1 in favor of Fiddle. 
> Fiddle docs:
>
> http://ruby-doc.org/stdlib-2.0.0/libdoc/fiddle/rdoc/Fiddle.html
>
> --Matt Jones 
>

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