-----------------------------------

Insectoid

Wed Dec 17, 2008 1:38 pm


illegal radix 0

-----------------------------------

I'm getting an error 'illegal radix 0' in my (rather inefficient and messy) bin/octal => decimal converter on this line:

#base is the base of the number (base, 2, base 8, etc.)
#temp is an integer of base

temp.to_s.length.times do |i|
    answer += (temp.to_s(i).to_i) * (base^i)
end



-----------------------------------

wtd

Wed Dec 17, 2008 1:42 pm


RE:illegal radix 0

-----------------------------------

irb(main):002:0> 15.to_s 0
ArgumentError: illegal radix 0
        from (irb):2:in `to_s'
        from (irb):2


-----------------------------------

Tony

Wed Dec 17, 2008 2:01 pm


Re: illegal radix 0

-----------------------------------

(base^i)
^ is XOR. ** is exp

irb
>> 2^2
=> 0
>> 2**2
=> 4



-----------------------------------

btiffin

Wed Dec 17, 2008 2:16 pm


RE:illegal radix 0

-----------------------------------

insectoid;

to_s wants a base to convert to.

Starts at 2.
try irb and

> 1234.to_s(2)
=> "10011010010"

> 1234.to_s(16)
=> "4d2"


Cheers


-----------------------------------

Insectoid

Wed Dec 17, 2008 2:58 pm


RE:illegal radix 0

-----------------------------------

btiffin, you have just completely nullified the entire purpose of this project by telling me this. Thanks. (sarcasm heavy there). But thanks, that will help me out.


-----------------------------------

Tony

Wed Dec 17, 2008 3:22 pm


RE:illegal radix 0

-----------------------------------

just because there's a build in method, does not mean that you can't rewrite it for practice anyway. Better yet, now you have a method to spec against.


-----------------------------------

btiffin

Wed Dec 17, 2008 3:37 pm


RE:illegal radix 0

-----------------------------------

I agree with Tony.  ;)  And as he pointed out, you should practise.   (things like ^ vs **).

10,000 hours is a lot of hours.  And we need more experts.  Not that you may want to be an expert at Ruby ... but I'll advise anyone to pick a few topics and struggle to level of expert.  

Knowing full well that any given human only gets to pick 1, 2 maybe 3.

Cheers


-----------------------------------

Insectoid

Wed Dec 17, 2008 3:55 pm


RE:illegal radix 0

-----------------------------------

Yeah, Ruby is one I want to master. I didn't mean that I'm not going to do it because there's already a method, rather that when it's done, it will remain rather useless.

I want to master Ruby, Java, and one of the C's (Java, just because it's so stupid I want to be able to say, ha! I beat you!)


-----------------------------------

wtd

Wed Dec 17, 2008 4:43 pm


RE:illegal radix 0

-----------------------------------

Useless code is what education is all about!  ;-)