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Michael,
JScript arrays ARE dynamic and sparse.
Dynamic means that their size can change at run time (you can grow array without problem
just by setting the element array[ array.length ] = value )
Sparse means that the elements do not need to be consecutively counted;
In other words array in JScript can have indexes numbers of
0,3,7,8,9,12,20
(note missing 1,2, 4, 5, 6....) - this is allowed in jscript but not in most other languages.
JScript arrays are "objects with dynamically added properties" thats why it is possible
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: "Michael.S.G." <OzFalcon@xxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Tuesday, March 16, 2004 12:28 PM
Subject: Re: [amibroker] Re: JScript equivalent of 'push' of PERL.
> I always thought they were dynamic, what does sparse mean?
>
> KR
> Michael.
>
>
> At 02:13 PM 16/03/2004, you wrote:
> >Michael,
> >
> >No ... I guess not.
> >
> >But I found the following link ===>
> >
> >http://msdn.microsoft.com/library/en-us/jscript7/html/UsingArr.asp?
> >frame=true
> >
> >So looks like JScript arrays are sparse and the size need not be
> >known at the time of declaration. This is, what I think, I wanted ...
> >
> >Regards,
> >- Salil V Gangal
> >
> >--- In amibroker@xxxxxxxxxxxxxxx, "Michael.S.G." <OzFalcon@xxxx>
> >wrote:
> > > Salil,
> > > I believe there is an example in the "cleanup.js" file written by
> >TJ.
> > >
> > > ie
> > > oStocksToDelete[ oStocksToDelete.length ] = oStock.Ticker;
> > >
> > > Is this what you mean?
> > >
> > > KR
> > > Michael.
> > >
> > >
> > >
> > >
> > > At 01:13 AM 16/03/2004, you wrote:
> > > >Michael,
> > > >
> > > >Thanks. A quick question. In PERL one can keep adding elements to
> > > >an array by statements such as
> > > >
> > > >push( @arrayOfTickers, $ticker1 );
> > > >push( @arrayOfTickers, $ticker2 );
> > > >push( @arrayOfTickers, $ticker3 );
> > > >...
> > > >...
> > > >...
> > > >
> > > >Beauty is that one need not know beforehand how many elements are
> >to
> > > >be added. (Therefore it's not necessary to know how many tickers
> >are
> > > >there in Spread-Sheet beforehand.)
> > > >
> > > >What's equivalent in JScript ?
> > > >
> > > >Regards,
> > > >- Salil V Gangal
> > > >
> > > >
> > > >--- In amibroker@xxxxxxxxxxxxxxx, "Michael.S.G." <OzFalcon@xxxx>
> > > >wrote:
> > > > > Opps, Big bug in that code.
> > > > >
> > > > > I forgot to close the file in the function.......... I do sugest
> > > >you fix
> > > > > this before trying this code.
> > > > >
> > > > > Here is new code, Untested.
> > > > >
> > > > >
> > > > >
> > > > > /*
> > > > > ** AmiBroker/Win32 script.
> > > > > **
> > > > > ** File:
> > > > > ** Updated: January 18th, 2004
> > > > > ** Purpose:
> > > > > ** Language: JavaScript (Windows Scripting Host)
> > > > > **
> > > > > ** The data is stored in lines with following format
> > > > > **
> > > > > **
> > > > > */
> > > > >
> > > > > /* change this line according to your data file name */
> > > > > base = "am200401/am200401";
> > > > > STicker = "GOLD";
> > > > > /* Output file is STicker.csv */
> > > > >
> > > > >
> > > > > WScript.Echo( "Ticker Find Started" );
> > > > >
> > > > > var fso, fw, f, r;
> > > > > var FName, outfile;
> > > > > var ForReading = 1;
> > > > > var ForWriting = 2;
> > > > > var ForAppending = 8;
> > > > >
> > > > > /* Create file system object */
> > > > > fso = new ActiveXObject( "Scripting.FileSystemObject" );
> > > > >
> > > > > outfile = STicker + ".csv";
> > > > > fw = fso.OpenTextFile( outfile, ForAppending, false);
> > > > >
> > > > > for( L1 = 1; L1 < 34; L1++ )
> > > > > {
> > > > > basename = base;
> > > > > if (L1 < 10)
> > > > > {
> > > > > basename = basename + "0";
> > > > > }
> > > > > FName = basename + (L1)+".prn";
> > > > > ImportStocks(FName);
> > > > > }
> > > > > fw.Close();
> > > > >
> > > > > WScript.Echo( "Ticker Find Finished" );
> > > > >
> > > > >
> > > > > function ImportStocks( filename )
> > > > > {
> > > > > var fields;
> > > > > var ticker;
> > > > >
> > > > > try
> > > > > {
> > > > >
> > > > > /* open ASCII file */
> > > > > f = fso.OpenTextFile( filename, ForReading);
> > > > >
> > > > > /* read the file line by line */
> > > > > while ( !f.AtEndOfStream )
> > > > > {
> > > > > r = f.ReadLine();
> > > > >
> > > > > /* split the lines using comma as a separator */
> > > > > fields = r.split(",");
> > > > >
> > > > > ticker = fields[0];
> > > > > if (ticker == STicker)
> > > > > {
> > > > > fw.WriteLine( r );
> > > > > }
> > > > > }
> > > > > }
> > > > > catch ( e )
> > > > > {
> > > > >
> > > > > WScript.echo( "There is a problem in file no." + L1 + ".\n"+
> > > >filename +
> > > > > "\nIt will be skipped and next file will be processed as
> >normal" );
> > > > >
> > > > > }
> > > > > f.close()
> > > > > }
> > > >
> > > >
> > > >
> > > >
> > > >Send BUG REPORTS to bugs@xxxx
> > > >Send SUGGESTIONS to suggest@xxxx
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> >
> >
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> >Yahoo! Groups Links
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> >
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