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Re: Overflow, integers and strings

Newsgroups comp.lang.javascript
Date 2015-05-03 09:17 -0700
References (13 earlier) <XnsA48E35CB52B7eejj99@194.109.133.246> <72e44d34-7f4d-4d32-8304-e73688132274@googlegroups.com> <3770518e-e91f-4368-9a69-cbd2f2461343@googlegroups.com> <a446b186-9ac4-410d-846d-3b2406a0bfd2@googlegroups.com> <87lhh5zmuy.fsf@bsb.me.uk>
Message-ID <033ac334-3ecd-4c66-bd8d-d39910fbfcf8@googlegroups.com> (permalink)
Subject Re: Overflow, integers and strings
From jonas.thornvall@gmail.com

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Den söndag 3 maj 2015 kl. 17:45:14 UTC+2 skrev Ben Bacarisse:
> jonas.thornvall@gmail.com writes:
> <snip>
> 
> Why did you quote over 450 lines of a previous post?  Please trim you
> quotes.
> 
> > If someone wants to change newbase into a bignumb function all the
> > necessary functions there. For a skilled programmer probably no more
> > than 10 lines of code.
> >
> > <SCRIPT LANGUAGE="Javascript">
> >
> > /*CONVERT A DECIMAL NUMBER INTO ANYBASE */ 
> >
> > function newbase(decNumber,base){
> 
> 'decNumber' is not a decimal number.  Both the name and the comment are
> wrong.
> 
> > var out =[]; 
> > digits=1;
> 
> global
> 
> > digmult=1;
> 
> global
> 
> > while(digmult*base<=decNumber){ 
> >         digmult=digmult*base 
> >         digits++; 
> > } 
> > digsave=digmult;
> 
> global
> 
> > while(decNumber>0 || digits>=0){ 
> >         loop=1;
> 
> global
> 
> >         digit=0;
> 
> global
> 
> >                for (digit=0;digit<=base;digit++) { 
> >         if((digit+1)*digmult>decNumber)break; 
> >                } 
> >         out[digits]=digit; 
> >         digmult=digmult*digit; 
> >         decNumber=decNumber-digmult; 
> >         digsave=digsave/base; 
> >         digmult=digsave; 
> >         digits--; 
> >         } 
> > if(out[0]==0) out.splice(0,1); 
> > return out; 
> > }
> 
> What about
> 
>   function newbase(num, base)
>   {
>       var digits = [];
>       do {
>           digits.push(num % base);
>           num = Math.floor(num / base);
>       } while (num);
>       return digits;
>   }
> 
> ?  This is the usual way to to it.
> 
> -- 
> Ben.

I know exactly what to do the problem is to get it work, first base and decnumber must be read intos array. Then replace the for loops into conditional loops that break on arrCompare. The adds and multiplication must use the big numb functions.

That is what i try todo, transform the function above into doing bignumb baseconversion. The function above work fine with its minor flaws, but howto get it convert form strings into other bases without cause overflow is not that easy.

All the functions are there to do it, but it is still a hairy problem to convert it into bignumb conversion.

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Overflow, integers and strings jonas.thornvall@gmail.com - 2015-04-30 00:11 -0700
  Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-04-30 01:29 -0700
    Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-04-30 03:31 -0700
    Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-04-30 03:33 -0700
      Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-04-30 13:38 +0200
        Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-04-30 08:20 -0700
          Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-04-30 20:37 +0200
            Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-04-30 23:46 -0700
              Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-01 01:01 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-01 01:47 -0700
                Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-01 10:50 +0200
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-01 02:04 -0700
                Re: Overflow, integers and strings Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-01 11:08 +0100
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-01 04:43 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-01 04:46 -0700
              Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-01 10:48 +0200
                Re: Overflow, integers and strings Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-01 10:58 +0100
                Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-01 14:34 +0200
                Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-01 14:47 +0200
                Re: Overflow, integers and strings "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-05-01 15:04 +0200
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-01 06:18 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-01 06:24 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-01 06:49 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-01 07:00 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-01 07:17 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-01 07:21 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-01 07:37 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-01 11:27 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-01 12:34 -0700
                Re: Overflow, integers and strings Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-05-01 22:42 +0200
                Re: Overflow, integers and strings "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-05-01 23:37 +0200
                Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-02 00:19 +0200
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-02 05:50 -0700
                Re: Overflow, integers and strings Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-02 14:21 +0100
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-03 04:30 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-03 07:12 -0700
                Re: Overflow, integers and strings Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-03 16:45 +0100
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-03 09:17 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-03 09:22 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 03:38 -0700
                Re: Overflow, integers and strings Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-04 14:01 +0100
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 06:41 -0700
                Re: Overflow, integers and strings Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-04 15:39 +0100
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 07:48 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 06:49 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 07:25 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 08:26 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 08:59 -0700
                Re: Overflow, integers and strings Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-05 00:59 +0100
                Re: Overflow, integers and strings Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-04 15:28 +0100
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 07:34 -0700
                Re: Overflow, integers and strings Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-04 15:41 +0100
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 07:52 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 08:03 -0700
                Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-04 17:56 +0200
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 09:04 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 09:21 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 09:38 -0700
                Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-04 21:07 +0200
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 12:25 -0700
                Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-04 21:43 +0200
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 12:46 -0700
                Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-04 22:11 +0200
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 12:53 -0700
                Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-04 22:23 +0200
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 13:40 -0700
                Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-04 23:12 +0200
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 13:06 -0700
                Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-04 22:39 +0200
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 13:42 -0700
                Re: Overflow, integers and strings Scott Sauyet <scott.sauyet@gmail.com> - 2015-05-04 13:40 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 13:47 -0700
                Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-04 23:30 +0200
                Re: Overflow, integers and strings "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-05-04 23:33 +0200
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 15:53 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 13:51 -0700
                Re: Overflow, integers and strings Scott Sauyet <scott.sauyet@gmail.com> - 2015-05-04 18:00 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 18:22 -0700
                Re: Overflow, integers and strings Scott Sauyet <scott.sauyet@gmail.com> - 2015-05-04 21:38 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 18:37 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 14:00 -0700
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 09:19 -0700
                Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-04 21:24 +0200
                Re: Overflow, integers and strings wolfgang zeidler <invalid@invalid.invalid> - 2015-05-04 21:37 +0200
                Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-04 21:56 +0200
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 13:21 -0700
                Re: Overflow, integers and strings wolfgang zeidler <invalid@invalid.invalid> - 2015-05-04 22:38 +0200
                Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-04 22:46 +0200
                Re: Overflow, integers and strings "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-05-04 22:57 +0200
                Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-04 23:17 +0200
                Re: Overflow, integers and strings Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-05 00:45 +0100
                Re: Overflow, integers and strings "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-05-06 00:01 +0200
                Re: Overflow, integers and strings Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-05-05 08:14 +0200
                Re: Overflow, integers and strings "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-05-05 23:54 +0200
                Re: Overflow, integers and strings wolfgang zeidler <invalid@invalid.invalid> - 2015-05-04 23:18 +0200
                Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-04 23:53 +0200
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 16:06 -0700
                Re: Overflow, integers and strings "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-05-05 10:26 +0200
                Re: Overflow, integers and strings Dr J R Stockton <reply1500@merlyn.demon.co.uk.invalid> - 2015-05-05 19:59 +0100
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-04 07:40 -0700
                Re: Overflow, integers and strings Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-05 01:10 +0100
                Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-05-01 05:03 -0700
        Re: Overflow, integers and strings Ben Bacarisse <ben.lists@bsb.me.uk> - 2015-04-30 20:36 +0100
          Re: Overflow, integers and strings jonas.thornvall@gmail.com - 2015-04-30 13:08 -0700
  Re: Overflow, integers and strings Scott Sauyet <scott.sauyet@gmail.com> - 2015-04-30 10:52 -0700

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