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Re: Impact of implicit arrays...

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On 6/18/2016 12:47 PM, Michael Haufe (TNO) wrote:
> On Tuesday, June 14, 2016 at 7:17:37 PM UTC-5, Chris M. Thomasson wrote:
>
>> Notice that both approaches have caveats, but both of them
>> will not have a chance to create a shi% load of objects!
>> Do you have some better ideas here?

> This still feels like premature optimization.
> I'd say start with implementing this in a naive way and
> optimize from there (after you benchmark). It won't help
> if on step 1 you have a potentially efficient but cryptic
> implementation and later on at step N you want/need to refactor
> but can't because you've built upon a non-obvious implementation.


> Something Naive (ES6):
>
> class Complex{}
>
> class ComplexRect extends Complex{
>   conj(){
>     return new ComplexRext(this.re,-this.im)
>   }
>   constructor(re,im){
>     this.re = re
>     this.im = im
>   }
>   equals(cr){
>     return this.re == cr.re && this.im == cr.im
>   }
>   magnitude(){
>     return Math.hypot(this.re,this.im)
>   }
>   plus(cr){
>     return new ComplexRect(this.re + cr.re, this.im + cr.im)
>   }
>   times(cr){
>     return new ComplexRect(
>      this.re*cr.re - this.im*cr.im,
>      this.re*cr.im + cr.re*this.im
>     )
>   }
> //TODO: etc
> }
>
> class ComplexPolar extends Complex {
>   constructor(r, theta){
>     this.r = r
>     this.theta = theta
>   }
>   // TODO
> }


So nice! I have not used ES6 and the (class x extends y) technique. I am 
wondering about browser support for this. How good is it?

Humm... FWIW, for some reason I also really like the simple array based 
method I am using now.

Yours is easier to read, but for me using foo[0] for x, foo[1] for y, 
ect looks more matrix like wrt indexing into an array; its not all that 
bad to my eyes. Also, it makes iterating over the elements really intuitive.

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Thread

Impact of implicit arrays... "Chris M. Thomasson" <nospam@nospam.com> - 2016-06-11 10:52 -0700
  Re: Impact of implicit arrays... Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-06-12 12:16 +0200
    Re: Impact of implicit arrays... "Chris M. Thomasson" <nospam@nospam.com> - 2016-06-13 12:23 -0700
  Re: Impact of implicit arrays... "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2016-06-13 22:00 -0700
    Re: Impact of implicit arrays... "Chris M. Thomasson" <nospam@nospam.com> - 2016-06-14 17:17 -0700
      Re: Impact of implicit arrays... Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-06-15 06:55 +0200
      Re: Impact of implicit arrays... "Chris M. Thomasson" <nospam@nospam.invalid> - 2016-06-14 22:19 -0700
      Re: Impact of implicit arrays... "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2016-06-18 12:47 -0700
        Re: Impact of implicit arrays... "Chris M. Thomasson" <invalid@invalid.invalid> - 2016-06-21 14:43 -0700
          Re: Impact of implicit arrays... "Christoph M. Becker" <cmbecker69@arcor.de> - 2016-06-22 00:10 +0200
            Re: Impact of implicit arrays... "Chris M. Thomasson" <invalid@invalid.invalid> - 2016-06-21 15:28 -0700
              Re: Impact of implicit arrays... "Chris M. Thomasson" <invalid@invalid.invalid> - 2016-06-21 15:31 -0700
                Re: Impact of implicit arrays... "Christoph M. Becker" <cmbecker69@arcor.de> - 2016-06-22 11:55 +0200
                Re: Impact of implicit arrays... "Chris M. Thomasson" <invalid@invalid.invalid> - 2016-06-23 12:23 -0700
                Re: Impact of implicit arrays... "Chris M. Thomasson" <invalid@invalid.invalid> - 2016-06-23 14:14 -0700
                Re: Impact of implicit arrays... "Chris M. Thomasson" <invalid@invalid.invalid> - 2016-06-23 14:16 -0700
                Re: Impact of implicit arrays... "Chris M. Thomasson" <invalid@invalid.invalid> - 2016-06-23 18:14 -0700
                Re: Impact of implicit arrays... "Chris M. Thomasson" <invalid@invalid.invalid> - 2016-06-23 18:46 -0700
          Re: Impact of implicit arrays... "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2016-06-21 17:35 -0700
            Re: Impact of implicit arrays... "Chris M. Thomasson" <invalid@invalid.invalid> - 2016-06-21 21:08 -0700
              Re: Impact of implicit arrays... "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2016-06-21 23:09 -0700
                Re: Impact of implicit arrays... "Chris M. Thomasson" <invalid@invalid.invalid> - 2016-06-23 14:38 -0700
                Re: Impact of implicit arrays... "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2016-06-24 07:16 -0700
                Re: Impact of implicit arrays... "Chris M. Thomasson" <invalid@invalid.invalid> - 2016-06-25 18:03 -0700
                Re: Impact of implicit arrays... "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2016-06-25 18:24 -0700
                Re: Impact of implicit arrays... "Chris M. Thomasson" <invalid@invalid.invalid> - 2016-07-01 13:52 -0700

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