List filter needed

[David Gifford]

Hi all

What list filter would I use to produce a list of tiddlers with no links in them?

[Mark S.]

Since there's no "haslink" operator, I don't think it can be done with just a simple filter. Here's what seems to work:

\define unlinked-tiddlers()
<$vars lb="[[[[" rb="]]]]">
<$list filter="[all[tiddlers]]">
<$list filter="[all[current]links[]limit[1]]" variable="dummy" emptyMessage={{{ [<currentTiddler>addprefix<lb>addsuffix<rb>] }}}>
</$list>
</$list>
</$vars>
\end

<$wikify name="unlinked" text=<<unlinked-tiddlers>>>
<$list filter="[enlist<unlinked>]">

</$list>
</$wikify>

[Mat]

I don't quite understand Marks solution so maybe that one is better, or just maybe it is exactly what I'm proposing here: I'd think the easier strategy would be to filter all tiddlers and then remove the ones that do have links to them. I believe you've solved the latter in your previous efforts with backlinks, so you'd do something like

[all[tiddlers]] -[<allwithlinks>]

(I'm not 100% sure of the "minus" syntax, but it's something like that)

<:-)

[Mark S.]

How do you get <allwithlinks> ??

[Mat]

Mark S. wrote:

How do you get <allwithlinks> ??

My assumption is that David wants all titles that are not backlinks (whatever is included in that term), and I believe he has solved how to get all backlinks. So I just mean "all tiddlers minus all backlinks". Maybe I misunderstood.

<:-)

[David Gifford]

Don't assume anything...what I need is for making sure I have added links to parent categories in all topic tiddlers, in my personal system. So I need a list of tiddlers with no links in them in the text field.

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[David Gifford]

And thanks Mark, I will try your solution in a little while.

[si]

I think this is what Mat was getting at:

<$list filter="[all[tiddlers]] -[all[tiddlers]backlinks[]]">
<<currentTiddler>>
<br>
</$list>

[Mark S.]

That would be, "All tiddlers with no backlinks to them." So I guess the question is what the question is.

[si]

I believe Mat is correct here. Backlinks are just tiddlers that link to a particular tiddler. If you return the backlinks for all tiddlers, you get every tiddler that contains a link.

[all[tiddlers]] -[all[tiddlers]backlinks[]] = all tiddlers that are not backlinks = all tiddlers that don't link to another tiddler = all tiddlers without links

[David Gifford]

Ah, now I understand. I was thinking backwards. Thanks!

On Sun, May 17, 2020, 3:27 PM si <matthew...@gmail.com> wrote:

I believe Mat is correct here. Backlinks are just tiddlers that link to a particular tiddler. If you return the backlinks for all tiddlers, you just get every tiddler that contains a link.

[all[tiddlers]] -[all[tiddlers]backlinks[]] = all tiddlers that are not backlinks = all tiddlers that don't link to another tiddler = all tiddlers without links

On Sunday, 17 May 2020 21:14:28 UTC+1, Mark S. wrote:

That would be, "All tiddlers with no backlinks to them." So I guess the question is what the question is.

On Sunday, May 17, 2020 at 11:19:47 AM UTC-7, Mat wrote:

Mark S. wrote:

How do you get <allwithlinks> ??

My assumption is that David wants all titles that are not backlinks (whatever is included in that term), and I believe he has solved how to get all backlinks. So I just mean "all tiddlers minus all backlinks". Maybe I misunderstood.

<:-)

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[TonyM]

David,

Reflecting on this thread, I was thinking are you looking for tiddlers that are not "referenced" in your wiki; I thought perhaps a more general test may be;

[all[tiddlers]] -[all[tiddlers]links[]]

But then looking at my own reference wiki I could even exclude tiddlers that have tags as these are organised by tag, and those that are themself tags. 

Then we are going beyond orphans 

orphans

all tiddlers to which there are no hard links

Regards

Tony

On Monday, 18 May 2020 06:30:28 UTC+10, David Gifford wrote:

Ah, now I understand. I was thinking backwards. Thanks!

On Sun, May 17, 2020, 3:27 PM si <matthew...@gmail.com> wrote:

I believe Mat is correct here. Backlinks are just tiddlers that link to a particular tiddler. If you return the backlinks for all tiddlers, you just get every tiddler that contains a link.

[all[tiddlers]] -[all[tiddlers]backlinks[]] = all tiddlers that are not backlinks = all tiddlers that don't link to another tiddler = all tiddlers without links

On Sunday, 17 May 2020 21:14:28 UTC+1, Mark S. wrote:

That would be, "All tiddlers with no backlinks to them." So I guess the question is what the question is.

On Sunday, May 17, 2020 at 11:19:47 AM UTC-7, Mat wrote:

Mark S. wrote:

How do you get <allwithlinks> ??

My assumption is that David wants all titles that are not backlinks (whatever is included in that term), and I believe he has solved how to get all backlinks. So I just mean "all tiddlers minus all backlinks". Maybe I misunderstood.

<:-)

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[David Gifford]

Thanks everyone...and then when I went to implement, I found that I had already done it (or found it) recently, but had forgotten already, and hadn't made the solution very visible in my wiki. Sorry to waste your time! Here is what I had:

<$list filter="[!is[system]sort[title]]">
<$list filter="[all[current]links[]limit[1]]" emptyMessage=<<emptymessage>>>
</$list>
</$list>

I am going to document this on the toolmap...

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