From: Marnen Laibow-Koser <marnen@...>
Date: 2009-12-04T10:21:44+09:00
Subject: Re: have a problem with the loops and variable

Steve Wilhelm wrote:
> Marnen Laibow-Koser wrote:
>> Steve Wilhelm wrote:
>>> 
>>> Marnen states:
>>> 
>>> "Note that it would be far more idiomatic to use s.each.  Never use += 
>>> to step through subscripts in Ruby."
>>> 
>>> An example based on Sajjad's original code would be helpful.
>> 
>> Then write one! :)  If you're not sure how, do what you can and post it 
>> here.  I'm sure I or someone else will be happy to look over it.
>> 
>>> Thanks in 
>>> advance.
>>> 
>>> - Steve W.
>> 
>> Best,
>> -- 
>> Marnen Laibow-Koser
>> http://www.marnen.org
>> marnen@marnen.org
> 
> Okay, Sajjad's original code was
> 
> q = 1
> w = 2
> while q < w
>   s[q] = 1
>   puts s[q]
>   q += 1
> end
> 
> 
> It was suggested to use s.each. The problem as I see it is that Sajjad 
> is trying to populate the array s with ones.
> 
> I think what Sajjad wanted was:
> 
> q, w = 1, 2
> s = Array.new(w - q) { 1 }

I think you're probably right.

> 
> It doesn't quite do what the original code attempts, because Sajjad's 
> code starts at array index 1 instead of 0. I do know know if that is 
> what he actually intended or if it is another bug.
> 
> Is there a better way to populate an array with default values using 
> array's each method?

No, I made the wrong suggestion.  Sorry.

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