From: Rob Biedenharn <Rob@...>
Date: 2006-06-27T02:06:21+09:00
Subject: Re: Question: Counting integers

On Jun 26, 2006, at 4:46 AM, Park Heesob wrote:

>> From: Timothy Hunter <TimHunter@nc.rr.com>
>> Reply-To: ruby-talk@ruby-lang.org
>> To: ruby-talk@ruby-lang.org (ruby-talk ML)
>> Subject: Re: Question: Counting integers
>> Date: Mon, 26 Jun 2006 09:35:26 +0900
>>
>> Dark Ambient wrote:
>>> I 've come across this somewhere but right now it's escapeing me.
>>>
>>> x = 100  , so I want to find out how many digits are in that number.
>>>
>>> ??
>>> Tia
>>> Stuart
>>>
>> irb(main):001:0> x = 100
>> => 100
>> irb(main):002:0> x.to_s.length
>> => 3
>>
>
> irb(main):001:0> x = 100
> => 100
> irb(main):002:0> Math.log10(x+1).ceil
> => 3
>
> Regards,
>
> Park Heesob

irb(main):003:0> x=0
=> 0
irb(main):004:0> Math.log10(x+1).ceil
=> 0
irb(main):005:0> x.to_s.scan(/\d/).length
=> 1
irb(main):006:0> x=100
=> 100
irb(main):007:0> x.to_s.scan(/\d/).length
=> 3


Rob Biedenharn		http://agileconsultingllc.com
Rob@AgileConsultingLLC.com
+1 513-295-4739