# Typos in eigenclass - Changes in Ruby 1.9

**URL:** <https://www.ruby-forum.com/t/typos-in-eigenclass-changes-in-ruby-1-9/111219>\
**Category:** Ruby\
**Created:** [August 3, 2007, 10:23pm UTC](https://www.ruby-forum.com/t/typos-in-eigenclass-changes-in-ruby-1-9/111219 "2007-08-03T22:23:03Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![wonado](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/w/919ad9/32.png) [@wonado](https://www.ruby-forum.com/u/wonado)\
**Post date:** [August 3, 2007, 10:23pm UTC](https://www.ruby-forum.com/t/typos-in-eigenclass-changes-in-ruby-1-9/111219/1 "2007-08-03T22:23:03Z")

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Moin, moin!

I didn’t find a way to post this in [http://eigenclass.org](http://eigenclass.org), so I put it  
here.

In [eigenclass.org](http://eigenclass.org/hiki.rb?Changes+in+Ruby+1.9#l54)  
(Enumerable#count) the following code was listed:

def count(\*a)  
inject(0) do |c, e|  
unless a.size == 1 # suspect, but this is how it works  
(a[0] == x) ? c + 1 : c  
else  
yield(x) ? c + 1 : c  
end  
end  
end

with the expected result:

[“bar”, 1, “foo”, 2].count(1) # =\> 1  
[“bar”, 1, “foo”, 2].count{|x| x.to\_i != 0} # =\> 2

This doesn’t work, because of the variable “x” and “unless” instead of  
“if”. After the following changes it works as expected:

module Enumerable  
def count(\*a)  
inject(0) do |c, e|  
if a.size == 1  
(a[0] == e) ? c + 1 : c  
else  
yield(e) ? c + 1 : c  
end  
end  
end  
end

p [“bar”, 1, “foo”, 2].count(1) # =\> 1  
p [“bar”, 1, “foo”, 2].count{|x| x.to\_i != 0} # =\> 2

Wolfgang Nádasi-Donner