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Message-ID: <2264524.FRqVoOGUtd@PointedEars.de>
From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Reply-To: Thomas 'PointedEars' Lahn <cljs@PointedEars.de>
Organization: PointedEars Software (PES)
Date: Thu, 01 Mar 2012 22:22:32 +0100
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Subject: Re: Reference to slice of an array
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Tom de Neef wrote:

> "Archos" <raul.san@sent.com> schreef in bericht
> news:628507ee-ddff-4106-8cdc-f2bf70d9423b@cj6g2000vbb.googlegroups.com...
>> How to get a reference to a slice of an array?
>>
>> var A = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j'];
>> var s = A.slice(1, 5); // ["b", "c", "d", "e"]
>>
>> A[1] = 'B';
>> // s is always goes to have ["b", "c", "d", "e"]
>> // but I would want could be got the value throught of a reference
>> // so could be got ["B", "c", "d", "e"]
> 
> Define a function ?
> A.mySlice = function(){return this.slice(1,5)};
> alert(A.mySlice());

You are missing the point of the question.

However, in their question the OP is missing the point as well.  Unlike in 
Java, the result of evaluating "b" is a primitive String value in ECMAScript 
implementations like JavaScript.  That value is only internally converted to 
a (non-primitive) object (a String instance) when it is used with property 
accessor syntax.  So there can be no reference to the former value.  In 
addition, String values and String instances are immutable.  RTFM (and 
RTFFAQ, where several of them are linked) is obviously an exercise the OP 
has yet to do.


PointedEars
-- 
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