From: Marnen Laibow-Koser <marnen@...>
Date: 2009-12-01T14:56:23+09:00
Subject: Re: have a problem with the loops and variable

Michael Linfield wrote:
> 
>> My last code :
>> -----------------
>> q = 1
>> w = 2
>> while q < w
>>   s[q] = 1
>>   puts s[q]
>>   q += 1
>> end
>> -----------------
>> 
>>  Why does not work ?
> 
> You should be declaring s as an array:  s[]
> 
>>> s = []                                                               
> => []
>>> q = 1                                                                
> => 1
>>> w = 2                                                                
> => 2
>>> while q < w                                                          
> ..   s[q] = 1
> ..   puts s[q]
> ..   q += 1
> ..   end
> 1
> => nil
>>>

Note that it would be far more idiomatic to use s.each.  Never use += to 
step through subscripts in Ruby.

Best,
-- 
Marnen Laibow-Koser
http://www.marnen.org
marnen@marnen.org
-- 
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