From: "David A. Black" <dblack@...>
Date: 2008-05-04T22:34:33+09:00
Subject: Re: Different Ways To Loop

Hi --

On Sun, 4 May 2008, Ashley Wharton wrote:

> On Sun, May 4, 2008 at 8:55 AM, Wyatt Greene <greenewm@yahoo.com> wrote:
>
>> On May 4, 1:54 am, Mike McKinney <r...@huikau.com> wrote:
>>> [Note:  parts of this message were removed to make it a legal post.]
>>>
>>> of course there's...
>>>
>>> i=0 and while(i<100) do
>>>   puts i+=1
>>> end
>>>
>>> i=0 and until(i==100) do
>>>   puts i+=1
>>> end
>>>
>>>
>>>
>> > On Sat, May 3, 2008 at 11:48 PM, Dan Zwell <dzw...@gmail.com> wrote:
>>>> Don't forget the "traditional" style loop:
>>>
>>>> for x in 1..100 do
>>>>    puts x+1
>>>> end
>>>
>>>> ara.t.howard wrote:
>>>
>>>>> On May 3, 2008, at 8:10 PM, Wyatt Greene wrote:
>>>
>>>>>>  1.upto(100) { |x| puts x }
>>>
>>>>> here are a few
>>>
>>>>> # 1
>>>>> puts Array.new(100){|i| i + 1}
>>>
>>>>> # 2
>>>>> i = 0 and loop do
>>>>>  puts i+=1
>>>>>  break if i >= 100
>>>>> end
>>>
>>>>> # 3
>>>>> puts <<-chars.strip.split(%r//).map{|c| c[0]}
>>>>>
>> \001\002\003\004\005\006\a\b\t\n\v\f\r\016\017\020\021\022\023\024\025\026\027\030\031\032\e\034\035\036\037!\"\#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcd
>>>
>>>>> chars
>>>
>>>>> # 4
>>>>> 100.times{|i| puts i + 1}
>>>
>>>>> a @http://codeforpeople.com/
>>>>> --
>>>>> we can deny everything, except that we have the possibility of being
>>>>> better. simply reflect on that.
>>>>> h.h. the 14th dalai lama
>>>
>>> --
>>> Aloha!
>>>
>>> Mike McKinney
>>> m...@huikau.com
>>> (http://blog.huikau.com)
>>
>> And here's an "object-oriented" way:
>>
>>  class Counter
>>   def count
>>     @count ||= 1
>>     puts @count
>>     @count += 1
>>     @count > 100
>>   end
>>  end
>>
>> counter = Counter.new
>> until counter.count; end
>>
>> Based on a response from Eric when I first asked for alternative ways to
> do this:
>
> MAX = 100
> def print_from_to(start, stop)
> start.upto(stop) do |number|
>   puts number
> end
> end
> loop do
> number = 1
> print_from_to(number, MAX)
> break
> end

I can think of lots of ways:

   puts *1..100
   puts *1..101-1
   puts *1..102-2   ...

or

   "This evaluates to true" and loop do ...

   "So does this" and loop do ...

:-)

I don't mean to scoff at the "more than one way" thing, but it does
in a sense contain the seeds of its own destruction :-)


David

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