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From: Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups: comp.lang.javascript
Subject: Re: Optimise adder
Date: Fri, 22 May 2015 11:25:48 +0100
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jonas.thornvall@gmail.com writes:

> Den fredag 22 maj 2015 kl. 11:45:06 UTC+2 skrev Ben Bacarisse:
>> jonas.thornvall@gmail.com writes:
>> 
>> > Den fredag 22 maj 2015 kl. 01:10:16 UTC+2 skrev Ben Bacarisse:
>> >> jonas.thornvall@gmail.com writes:
>> >> 
>> >> > Den torsdag 21 maj 2015 kl. 22:40:50 UTC+2 skrev Ben Bacarisse:
>> >> >> jonas.thornvall@gmail.com writes:
>> >> >> 
>> >> >> > Den torsdag 21 maj 2015 kl. 21:03:40 UTC+2 skrev Ben Bacarisse:
>> >> >> >> jonas.thornvall@gmail.com writes:
>> >> >> >> 
>> >> >> >> > Den torsdag 21 maj 2015 kl. 18:04:22 UTC+2 skrev Ben Bacarisse:
>> >> >> >> >> jonas.thornvall@gmail.com writes:
>> >> <snip>
>> >> >> >> >> > It permit anybase, but you have to format your number
>> >> >> >> >> > into that base
>> >> >> >> >> > Before feeding the function, try base two.
>> >> >> >> >> 
>> >> >> >> >> The code you posted does not permit any base.
>> >> >> >> >
>> >> >> >> > Not true, here i changed base same code, different number format.
>> >> >> >> 
>> >> >> >> Yes, true.  Here's a test case for you:
>> >> >> >> 
>> >> >> >>   base=9007199254740992;
>> >> >> >>   var arrOne = [base-1];
>> >> >> >>   var arrTwo = [2];
>> >> <snip>
>> >> > Yes i did and i got 1,1 in any brwoser.
>> >> 
>> >> I'm having a hard time believing you.  Partly because you've posted two
>> >> examples that *look* similar but are, in fact, different (so maybe you
>> >> have a typo somewhere in your test), partly because I've just tried
>> >> another two implementations and I can't get anything but [0,1] in any of
>> >> them, but mostly because I know how ECMAScript Numbers are defined so I
>> >> know how these numbers get processed by your function.
>> >> 
>> >> > For your example, except you do apparently wrong when defining
>> >> > arrOne base-1.  Try arrOne = [9007199254740991]
>> >> 
>> >> Yes, I did that.  Two command-line implementations and (now) five
>> >> browsers all gave the same incorrect result.  Put your test case
>> >> (i.e. for base = 9007199254740992, arrOne = [9007199254740991] and
>> >> arrTwo = [2]) on a public page and I'll try it with the browsers I have.
>> <snip>
>> 
>> > Iexplorer, firefox and Chrome all give the correct answer 1,1
>> 
>> Yes, of course.  That's not the test case I gave you.
>> 
>> > http://jt.node365.se/add.html
>> 
>> I was right not to believe you and I am not 100% sure it was a genuine
>> mistake.
>> 
>> -- 
>> Ben.
>
> What to you mean do you suggest that, my function responsible for
> base-1 in your definition of the array? That must be javascript doing
> something weird not the function or?  I do not think i understand what
> you mean, please clarify?

I posted an example base that does not work.  You copied it incorrectly
and claimed my example was wrong, when the error was in your copying.

> If it bugs out on base - 1 but not on var arrOne = [900719925474091];
> it certainly can not be because of the function?
>
> base=900719925474092;

That was not the base I gave you.  I wrote: base=9007199254740992.

> var arrOne = [900719925474091]; //Is different from base-1?

I suggested 9007199254740991 and you actually said that you have tried
that number but the code posted today used this other number.

> var arrTwo = [2];

-- 
Ben.