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Weird Code: Check My Reading of It

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  Weird Code: Check My Reading of It Gene Wirchenko <genew@ocis.net> - 2011-12-08 20:46 -0800
    Re: Weird Code: Check My Reading of It David Mark <dmark.cinsoft@gmail.com> - 2011-12-08 21:34 -0800
      Re: Weird Code: Check My Reading of It Norman Peelman <npeelmandog@cfl.rr.com> - 2011-12-09 06:55 -0500
        Re: Weird Code: Check My Reading of It David Mark <dmark.cinsoft@gmail.com> - 2011-12-09 12:07 -0800
        Re: Weird Code: Check My Reading of It Gene Wirchenko <genew@ocis.net> - 2011-12-09 10:09 -0800
    Re: Weird Code: Check My Reading of It Dr J R Stockton <reply1149@merlyn.demon.co.uk> - 2011-12-10 20:37 +0000

#9018 — Weird Code: Check My Reading of It

Dear JavaScripters:

     The text I am following has a oddball piece of code.  Please
check that I am reading it right.

***** Start of Oddball Code *****
function writeDocument(n,s) {
 var doc=parent.frames[1].frames[n].location = s
}
***** End of Oddball Code *****

     As I read this, the location for a frame will be set to s.  doc,
a local variable, will be set to s as well.  But this is all there is
to the function, and therefore, the
          var doc=
part of the body serves no useful purpose.

     Am I correct in my reading?

     Sometimes, I think that errors like this in a text are horrible;
other times, I think it is good exercise.  I am undecided here.  (I
did not know about JavaScript's multiple assignment, so I suppose that
I have learned something.)

Sincerely,

Gene Wirchenko

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#9019

On Dec 8, 11:46 pm, Gene Wirchenko <ge...@ocis.net> wrote:
> Dear JavaScripters:
>
>      The text I am following has a oddball piece of code.  Please
> check that I am reading it right.
>
> ***** Start of Oddball Code *****
> function writeDocument(n,s) {
>  var doc=parent.frames[1].frames[n].location = s}
>
> ***** End of Oddball Code *****
>
>      As I read this, the location for a frame will be set to s.  doc,
> a local variable, will be set to s as well.  But this is all there is
> to the function, and therefore, the
>           var doc=
> part of the body serves no useful purpose.

Right. Goes right out of scope.

And why they are trying to set the location property is anyone's
guess.

>
>      Am I correct in my reading?
>
>      Sometimes, I think that errors like this in a text are horrible;
> other times, I think it is good exercise.  I am undecided here.  (I
> did not know about JavaScript's multiple assignment, so I suppose that
> I have learned something.)
>
> Sincerely,
>
> Gene Wirchenko

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#9024

On 12/09/2011 12:34 AM, David Mark wrote:
> On Dec 8, 11:46 pm, Gene Wirchenko<ge...@ocis.net>  wrote:
>> Dear JavaScripters:
>>
>>       The text I am following has a oddball piece of code.  Please
>> check that I am reading it right.
>>
>> ***** Start of Oddball Code *****
>> function writeDocument(n,s) {
>>   var doc=parent.frames[1].frames[n].location = s}
>>
>> ***** End of Oddball Code *****
>>
>>       As I read this, the location for a frame will be set to s.  doc,
>> a local variable, will be set to s as well.  But this is all there is
>> to the function, and therefore, the
>>            var doc=
>> part of the body serves no useful purpose.
>
> Right. Goes right out of scope.
>

   Is there an attempt to use 'doc' (this one that has just been 
assigned parent.frames[1].frames[n].location) anywhere else in the code?

> And why they are trying to set the location property is anyone's
> guess.
>

   I assume to load the new location into the desired frame(n).

>>
>>       Am I correct in my reading?
>>
>>       Sometimes, I think that errors like this in a text are horrible;
>> other times, I think it is good exercise.  I am undecided here.  (I
>> did not know about JavaScript's multiple assignment, so I suppose that
>> I have learned something.)
>>
>> Sincerely,
>>
>> Gene Wirchenko
>

-- 
Norman
Registered Linux user #461062
AMD64X2 6400+ Ubuntu 10.04 64bit

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#9062

On Dec 9, 6:55 am, Norman Peelman <npeelman...@cfl.rr.com> wrote:
> On 12/09/2011 12:34 AM, David Mark wrote:
>
>
>
>
>
>
>
>
>
> > On Dec 8, 11:46 pm, Gene Wirchenko<ge...@ocis.net>  wrote:
> >> Dear JavaScripters:
>
> >>       The text I am following has a oddball piece of code.  Please
> >> check that I am reading it right.
>
> >> ***** Start of Oddball Code *****
> >> function writeDocument(n,s) {
> >>   var doc=parent.frames[1].frames[n].location = s}
>
> >> ***** End of Oddball Code *****
>
> >>       As I read this, the location for a frame will be set to s.  doc,
> >> a local variable, will be set to s as well.  But this is all there is
> >> to the function, and therefore, the
> >>            var doc=
> >> part of the body serves no useful purpose.
>
> > Right. Goes right out of scope.
>
>    Is there an attempt to use 'doc' (this one that has just been
> assigned parent.frames[1].frames[n].location) anywhere else in the code?
>
> > And why they are trying to set the location property is anyone's
> > guess.
>
>    I assume to load the new location into the desired frame(n).
>

But that's the location.href property.  ;)

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#9074

On Fri, 09 Dec 2011 06:55:18 -0500, Norman Peelman
<npeelmandog@cfl.rr.com> wrote:

>On 12/09/2011 12:34 AM, David Mark wrote:
>> On Dec 8, 11:46 pm, Gene Wirchenko<ge...@ocis.net>  wrote:
>>> Dear JavaScripters:
>>>
>>>       The text I am following has a oddball piece of code.  Please
>>> check that I am reading it right.
>>>
>>> ***** Start of Oddball Code *****
>>> function writeDocument(n,s) {
>>>   var doc=parent.frames[1].frames[n].location = s}
>>>
>>> ***** End of Oddball Code *****
>>>
>>>       As I read this, the location for a frame will be set to s.  doc,
>>> a local variable, will be set to s as well.  But this is all there is
>>> to the function, and therefore, the
>>>            var doc=
>>> part of the body serves no useful purpose.
>>
>> Right. Goes right out of scope.

     Thank you.

>   Is there an attempt to use 'doc' (this one that has just been 
>assigned parent.frames[1].frames[n].location) anywhere else in the code?

     I have not entered the code so I can not search it so easily, but
in my eyeball scans of the code, I have seen no other use of doc.

>> And why they are trying to set the location property is anyone's
>> guess.

>   I assume to load the new location into the desired frame(n).

     Exactly.  It is a simple catalog, and the displaying is of a
picture and the product name.

[snip]

Sincerely,

Gene Wirchenko

.

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#9109

In comp.lang.javascript message <k243e7ltslnc4op0hd6api696jep2qja0j@4ax.
com>, Thu, 8 Dec 2011 20:46:41, Gene Wirchenko <genew@ocis.net> posted:

>***** Start of Oddball Code *****
>function writeDocument(n,s) {
> var doc=parent.frames[1].frames[n].location = s
>}
>***** End of Oddball Code *****

From the function line, I would half-expect that to have been intended
to write the general HTML string s into the specified frame, in which
case there is a missing (.innerHTML || .somethingElse).

>     As I read this, the location for a frame will be set to s.  doc,
>a local variable, will be set to s as well.  But this is all there is
>to the function, and therefore, the
>          var doc=
>part of the body serves no useful purpose.

Yes.  I would have used location.href.

>  (I
>did not know about JavaScript's multiple assignment

Be careful with it.

X = Y = 3          ; Y++             ; Z = [+X, +Y]     // [3, 4]
X = Y = new Date() ; Y.setTime(3456) ; Z = [+X, +Y]     // [3456, 3456]

-- 
 (c) John Stockton, nr London, UK.    ?@merlyn.demon.co.uk     Turnpike v6.05.
 Website  <http://www.merlyn.demon.co.uk/> - w. FAQish topics, links, acronyms
 PAS EXE etc. : <http://www.merlyn.demon.co.uk/programs/> - see in 00index.htm
 Dates - miscdate.htm estrdate.htm js-dates.htm pas-time.htm critdate.htm etc.

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