From: Greg Barozzi <greg5000@...>
Date: 2009-10-23T02:26:05+09:00
Subject: Re: convert/replace a value of nil with 0?

Mmcolli00 Mom wrote:
> Do you know how I can convert or replace any value that gets back a
> 'nil' to 0?
> 
> For instance, the myArrayVal[0] may or may not contain a number and I
> want the code to default to 0 if a nil is returned. I have not found any
> documentation on this.


If you want to check each value in an array, try:



myArrayVal.each_index do |i|
   myArrayVal[i] = 0 if myArrayVal[i].nil?
end



The each_index method allows you to iterate through the array and access 
each element specifically.

A less wordy way of writing this would be:



myArrayVal.each_index do |i|
   myArrayVal[i] ||= 0
end


But using ||= will also convert a value of FALSE to 0, and that may not 
be a valid operation in your app. Hope this helps and good luck.
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