From: Steve Wilhelm <steve@...831.com>
Date: 2009-12-04T05:06:54+09:00
Subject: Re: have a problem with the loops and variable

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 }

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?




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