Hi

I have searched/Googled around but I’m struggling with the following

problem.

I am building a Rails 2.3.2 application and one of the requirements is

to calculate the median of an array of results. I am using code for

calculating the median from the Ruby Cookbook but keep running in to a

problem with receiving an error ‘LocalJumpError - no block given’ when

I attempt to find the median of an array where there are an odd number

of members.

The example code in my view is as follows:

<%= survey_response.median([6,4,5,4,4,2]) %>

Then in survey_response.rb model the methods are as follows:

def mean(array)

array.inject(array.inject(0) { |sum, x| sum += x } /

array.size.to_f)

end

def median(array,already_sorted=false)

return nil if array.empty?

array = array.sort unless already_sorted

m_pos = array.size / 2

return array.size % 2 == 1 ? array[m_pos] : mean(array

[m_pos-1…m_pos])

end

The error is caused when the median method refers back to the mean

method to get the media of an odd total of items in the array. I just

can’t figure out why I get that error or indeed how to fix it - so I’d

hugely appreciate any help/guidance/laughing anybody could offer me!

Thanks

Simon