Re: duplicator an array

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From	Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups	comp.lang.javascript
Subject	Re: duplicator an array
Date	Thu, 14 Apr 2016 22:23:06 +0200
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Thomas 'Ingrid' Lahn wrote:

>   try
>   {
>     Object.defineProperty(Array.prototype, "duplicate", {
>       value: function () {
>         return this.concat(this.slice());
>       },
> 
>       /* optional; the default for each attribute is “false” */
>       configurable: true,
>       enumerable: false,
>       writable: true
>     });
>   }
>   catch
 .--------^
 :
(e)

>   {
>     console.warn("Array.prototype.duplicate cannot be (re)configured.");
>   }
> 
> […]
> Otherwise the only safe approach is to augment the instance instead of its
> prototype:
> 
> (function () {
>   var a = [1, 2, 3];
> 
>   a.duplicate = function () {
>     return this.concat(this.slice());
>   };

Or like above.

-- 
PointedEars
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Thread

duplicator an array JRough <janis.rough@gmail.com> - 2016-04-13 18:27 -0700
  Re: duplicator an array Aleksandro <aleksandro@gmx.com> - 2016-04-14 01:00 -0300
    Re: duplicator an array JRough <janis.rough@gmail.com> - 2016-04-14 09:53 -0700
    Re: duplicator an array "Christoph M. Becker" <cmbecker69@arcor.de> - 2016-04-14 19:41 +0200
      Re: duplicator an array Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-04-14 22:09 +0200
        Re: duplicator an array Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-04-14 22:23 +0200
    Re: duplicator an array Stefan Weiss <krewecherl@gmail.com> - 2016-04-16 14:27 +0200
      Re: duplicator an array Joao Rodrigues <jr@none.com> - 2016-04-16 12:01 -0300
        Re: duplicator an array Joao Rodrigues <jr@none.com> - 2016-04-16 13:43 -0300
      Re: duplicator an array Aleksandro <aleksandro@gmx.com> - 2016-04-16 14:13 -0300
  Re: duplicator an array bharat.bandgar009@gmail.com - 2017-05-03 01:33 -0700

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