[FMPP] RE: fmpp-open digest, Vol 1 #26 - 2 msgs

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Thankyou very much once again for your help.
You are very right, i was trying to save hash values in the sequence because 
thats the requirement for the project that the hierarchy of the structure be 
kept like this.
Now i understood the concept of the "index" parameter in the @pp.add from 
the example you gave. I have read the documents quite intensively already 
and i am really sorry as the lack of examples sometimes really confuse me. 
But now when i read the explanation again after this email, i feel that it 
didnt need an example to explain, i should have understood it in the first 
place.
Btw i am a pakistani student and am doing my masters here in germany 
currently.

thanks once again for your help.
Best Regards
Asadullah Khan Niazi

>Today's Topics:
>
>    1. help required regarding saving values in a sequence during a loop 
>(Asad Niazi)
>    2. Re: help required regarding saving values in a sequence during a 
>loop (Daniel Dekany)
>
>--__--__--
>
>Message: 1
>From: "Asad Niazi" <noo...@ho...>
>To: fmp...@li...
>Date: Wed, 16 Jun 2004 14:52:36 +0500
>Subject: [FMPP] help required regarding saving values in a sequence during 
>a loop
>Reply-To: fmp...@li...
>
>Hello!
>I have a problem regarding saving values in a sequence (using the add/set
>fmpp pphash) during a loop (inside the <#list> ). I intended to increase 
>the
>index by increasing the counter x e.g. index = x, where x is increasing in
>every run of the loop.
>
>The actual problem is that i dont understand the difference of "add" and
>"set" fmpp pphash when they are used to add values in a sequence. For your
>help let me outline what i am trying to do:
>e.g the Writable seqeunce will be NamedNumber
>it will have 2 subelements or "keys"; "Name" and "Number"
>they can store values for lot of "names" and "numbers" (which makes it a
>sequence)
>
>What I have currently done is that i have tried different combinations of
>"set" and "add" on this writable sequence.
>
><@pp.add	seq=NamedNumber	index=x	value={"Name": whatevervalue} />
>
>should this work??
>
>or should i use??
>
><@pp.set	seq=NamedNumber	index=x	key="Name"	value=whatevervalue />
>
>somehow both of these are not working. As i told you before i am not very
>clear with the difference of set and add pphashes and the use of index
>parameter in them.
>I am desperately looking for help in this matter. I ll be looking forward 
>to
>your reply. Thanking in anticipation.
>
>Best Regards
>Asadullah Khan Niazi
>
>_________________________________________________________________
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>
>--__--__--
>
>Message: 2
>Date: Wed, 16 Jun 2004 18:12:02 +0200
>From: Daniel Dekany <dd...@fr...>
>To: Asad Niazi <fmp...@li...>
>Subject: Re: [FMPP] help required regarding saving values in a sequence 
>during a loop
>Reply-To: fmp...@li...
>
>Wednesday, June 16, 2004, 11:52:36 AM, Asad Niazi wrote:
>
> > Hello!
> > I have a problem regarding saving values in a sequence (using the 
>add/set
> > fmpp pphash) during a loop (inside the <#list> ). I intended to increase 
>the
> > index by increasing the counter x e.g. index = x, where x is increasing 
>in
> > every run of the loop.
> >
> > The actual problem is that i dont understand the difference of "add" and
> > "set" fmpp pphash when they are used to add values in a sequence.
>
>As the documentation says, "add" inserts a new item, while "set"
>replaces an already existing item at the specified index.
>
> > For your help let me outline what i am trying to do: e.g the Writable
> > seqeunce will be NamedNumber it will have 2 subelements or "keys";
>
>Sequences has no "keys". Only hashes has keys. Sequences has indexes.
>
> > "Name" and "Number" they can store values for lot of "names" and
> > "numbers" (which makes it a sequence)
> >
> > What I have currently done is that i have tried different combinations 
>of
> > "set" and "add" on this writable sequence.
> >
> > <@pp.add        seq=NamedNumber index=x value={"Name": whatevervalue} />
> >
> > should this work??
>
>Yes... as far as the variable values are correct, i.e. x is an integer
>with correct value, etc.
>
> > or should i use??
> >
> > <@pp.set        seq=NamedNumber index=x key="Name"      
>value=whatevervalue />
>
>It's surely bad, as sequences has no keys.
>
> > somehow both of these are not working. As i told you before i am not 
>very
> > clear with the difference of set and add pphashes and the use of index
> > parameter in them.
>
>It seems that the root of the problem that you don't understand what are
>sequences and what's a hashes. You may should read the FreeMarker Manual
>about this, if you didn't. Anyway... I try to explain it now. Both data
>structure is a collection. They store multiple values of *any* type.
>Now, to access (read/modify/delete/etc.) a value in a collection somehow
>you must use the unique address of the value (unique in the collection).
>In the case of hashes addresses are strings that are called keys. In the
>case of sequences addresses are integer numbers that are called indices.
>The indices has the restriction that they are continuos and always
>starting from 0, so for example if the sequence length is 4, then the
>available indexes are 0, 1, 2, 3 (so if you "pp.add" a value with index
>2, then the the size will grow to 5, and the index of the values after 2
>will increase by 1).
>
>Now, in your case you just want to address words (the names) with an
>integer index, so you don't need hashes at all (seems that you tried to
>build a sequence of hash values... you can, but I guess you don't need
>to). So what you want could work somehow like this:
>
>   <#assign NamedNumber = pp.newWritableSequence()>
>   <@pp.add seq=NamedNumber value="Foo" />
>   <@pp.add seq=NamedNumber value="Bar" />
>   <@pp.add seq=NamedNumber value="Baaz" />
>   Now test it:
>   <#list NamedNumber as n>
>   - ${n}
>   </#list>
>   ${NamedNumber[1]}
>
>(See the @pp.add documentation about the meaning of missing "index"
>parameter.) And this outputs:
>
>   Now test it:
>   - Foo
>   - Bar
>   - Baaz
>   Bar
>
>Of course, in the above template could be implemented without writable
>sequences as well:
>
>   <#assign NamedNumber = ["Foo", "Bar", "Baaz"]>
>
> > I am desperately looking for help in this matter. I ll be looking 
>forward to
> > your reply. Thanking in anticipation.
>
>Well, *if* you didn't do it so till now, use the FMPP and the FreeMarker
>Manual intensively... they are quite detailed, it's all described there.
>
> > Best Regards
> > Asadullah Khan Niazi
>
>BTW, which country?
>
>--
>Best regards,
>  Daniel Dekany
>
>
>
>
>
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>
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>
>End of fmpp-open Digest

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