From: Stefan Rusterholz <apeiros@...>
Date: 2007-08-07T00:08:50+09:00
Subject: Re: pulling specific dup. elements out of an array

Jon Hawkins wrote:
> Chris wrote:
>> why didn't reject work?
>> 
>>>> array =  ['234234','04593','4098234','0','0','0']
>> => ["234234", "04593", "4098234", "0", "0", "0"]
>>>> array.reject {|e| e == '0' }
>> => ["234234", "04593", "4098234"]
> 
> well lemme further explain what im attempting to do and why i couldnt 
> get reject to work right, i need to delete all the 0's in the array then 
> add up those non-zero numbers.
> with:
> 
>  array.inject(0) {|num, i| num + i}/array.length/1024   #1024 = 
> kilobytes convert
> 
> so if theres a way to shove reject into that then lemme know ^^
> 
> Thanks
> -Jon

Why do you want to remove the 0 elements for that? They won't influence 
the result:
avg_kb = array.inject(0.0) { |sum,num| sum + num.to_f 
}/array.length/1024

If you don't want the average without zero-size files write
array.delete('0')
in the line before, as Daniel Lucraft already pointed out.

Regards
Stefan
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