[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Tobias Beer]

Hi Philip,

Late reply, here's a simple *random[]* filter.

http://tobibeer.github.io/tw5-plugins/#random (annoucement 

)

Best wishes,

Tobias. 

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Guglielmo]

Hello!

When a dummy like me, will be able to install such a great plugin in my 
tiddlywiki5? I looked for the installation plugin but without success! I 
hope you can help me.

Thank you!


Guglielmo



Il giorno domenica 8 marzo 2015 00:18:30 UTC+1, Neil Griffin ha scritto:
>
>
> I like it, it is far simpler than how I was doing it, which for something 
>> that seems to have as much interest as this does is a very good thing. 
>> Could you add an option to pick how many tiddlers are returned? Like 
>>
>> <$action-chooserandom $filter={{SearchText}} $tiddler="SearchResults" 
>>> $field="randomlist" $pick=5/> 
>>>
>>
>> to return a list of 5 random tiddlers you could put in a list widget?
>>
>
> How's this?:
> http://ng110.tiddlyspot.com/#Choose%20Random%20Demo%202 
>
> Neil.
>

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Eric Shulman]

On Sunday, March 8, 2015 at 9:57:42 AM UTC-7, Neil Griffin wrote:
>
> If the $ is needed in some cases, is there an argument for allowing it for 
> all widget parameters to improve consistency?
>

Respectfully, that makes *no* sense!  There is a need to differentiate 
parameters with the same name that are to be handled differently (e.g., 
"$tiddler" vs. "tiddler").  If all widget params have a $ prefix, we'd 
still need to invent *another* way to differentiate the parameters.

Also, if *all* widget parameters use the $ prefix, then why have the prefix 
at all?

As an example of the result of the confusion caused by inconsistency, a 
> couple of times I have neglected the $ in the $tiddler and $field 
> parameters of a $action-setfield widget, with the result that, when 
> activated, the action defaulted to the text field of the current tiddler, 
> overwriting all the text I was working on!  That's extremely annoying, and 
> quite difficult to debug when you no longer have the wikitext that caused 
> the problem!
>

Changing the syntax won't provide a solution for your specific problem, as 
you still need to explicitly differentiate the use of the same parameter 
names, and the underlying cause of the problem is that you *forgot* to do 
that.  Perhaps the better solution is to have a "developer debugging mode" 
setting that would add some extra checks with a prompt to confirm before a 
widget overwrites any data in the store (e.g., "Are you sure you want to 
change TiddlerName!!fieldname?")...  Maybe it can just check for overwrites 
for the "text" field, and be limited to widgets that actually use the 
"$foo" vs "foo" parameter handling, so that it isn't too disruptive during 
development.  Of course, the setting could be turned off after debugging, 
so that real-world use would nto be affected.

enjoy,
-e
Eric Shulman
TiddlyTools / ELS Design Studios

"Inside TiddlyWiki: The Missing Manual"
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manual/x/8816263
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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Neil Griffin]

If the $ is needed in some cases, is there an argument for allowing it for 
all widget parameters to improve consistency?

As an example of the result of the confusion caused by inconsistency, a 
couple of times I have neglected the $ in the $tiddler and $field 
parameters of a $action-setfield widget, with the result that, when 
activated, the action defaulted to the text field of the current tiddler, 
overwriting all the text I was working on!  That's extremely annoying, and 
quite difficult to debug when you no longer have the wikitext that caused 
the problem!

Neil.



On Saturday, 7 March 2015 16:54:47 UTC, Eric Shulman wrote:
>
> On Saturday, March 7, 2015 at 8:00:53 AM UTC-8, Jed Carty wrote:
>>
>> Action widgets use $ for the parameters, I am assuming that is because 
>>> you can pass (some of) them lists of name=value pairs, like the setfield 
>>> widget. The $ in needed to distinguish between things like in this example
>>>
>>
>> <$action-setfield $tiddler=SomeTiddler tiddler=hi/>
>>>
>>
>> which sets the field called tiddler of SomeTiddler to hi. I am assuming 
>> that $ was picked because it isn't a valid symbol in a field name. 
>>
>
>
> The $ prefix is used to differentiate parameters used by the widget itself 
> as compared to parameters without the $, which are simply "passed through" 
> to the specific macro or action being invoked by the widget.  For most 
> widgets (except $macrocall and $action-xxx), the parameters do not have the 
> $ prefix.
>
> -e
>

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Neil Griffin]

> I like it, it is far simpler than how I was doing it, which for something 
> that seems to have as much interest as this does is a very good thing. 
> Could you add an option to pick how many tiddlers are returned? Like 
>
> <$action-chooserandom $filter={{SearchText}} $tiddler="SearchResults" 
>> $field="randomlist" $pick=5/> 
>>
>
> to return a list of 5 random tiddlers you could put in a list widget?
>

How's this?:
http://ng110.tiddlyspot.com/#Choose%20Random%20Demo%202 

Neil.

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Eric Shulman]

On Saturday, March 7, 2015 at 8:00:53 AM UTC-8, Jed Carty wrote:
>
> Action widgets use $ for the parameters, I am assuming that is because you 
>> can pass (some of) them lists of name=value pairs, like the setfield 
>> widget. The $ in needed to distinguish between things like in this example
>>
>
> <$action-setfield $tiddler=SomeTiddler tiddler=hi/>
>>
>
> which sets the field called tiddler of SomeTiddler to hi. I am assuming 
> that $ was picked because it isn't a valid symbol in a field name. 
>


The $ prefix is used to differentiate parameters used by the widget itself 
as compared to parameters without the $, which are simply "passed through" 
to the specific macro or action being invoked by the widget.  For most 
widgets (except $macrocall and $action-xxx), the parameters do not have the 
$ prefix.

-e

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Jed Carty]

Neil,

I like it, it is far simpler than how I was doing it, which for something 
that seems to have as much interest as this does is a very good thing. 
Could you add an option to pick how many tiddlers are returned? Like 

<$action-chooserandom $filter={{SearchText}} $tiddler="SearchResults" 
> $field="randomlist" $pick=5/> 
>

to return a list of 5 random tiddlers you could put in a list widget?

Action widgets use $ for the parameters, I am assuming that is because you 
can pass (some of) them lists of name=value pairs, like the setfield 
widget. The $ in needed to distinguish between things like in this example

<$action-setfield $tiddler=SomeTiddler tiddler=hi/>
>

which sets the field called tiddler of SomeTiddler to hi. I am assuming 
that $ was picked because it isn't a valid symbol in a field name. 

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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Eric Shulman]

>
> The notation is essentially the same as Jeremy's suggestion, except I used 
> attribute names with the $ prefix (is there a good reason for the 
> inconsistency on use of $ in different widgets? I often get errors due to 
> guessing wrongly, and sometimes these can be data-deleting errors)
>

The $ prefix is ONLY used for the widget name (i.e., <$name >). 
 Attribute names are just simple keywords.  The $ also is used as a prefix 
on "system" tiddlers (i.e,. "$:/..."), which can be *transcluded* as 
parameter values in a widget call (using the {{...}} syntax).  However, 
this is not an "attribute name"... it's a reference to a tiddler.

enjoy,
-e
Eric Shulman
TiddlyTools / ELS Design Studios

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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Neil Griffin]

Halfway down this thread, Jeremy suggested an approach for selecting a 
random tiddler which seemed to me to be the cleanest method.  I don't know 
if anyone tried to implement this $action-chooserandom widget, so I did it 
myself and thought I'd share the result.  The notation is essentially the 
same as Jeremy's suggestion, except I used attribute names with the $ 
prefix (is there a good reason for the inconsistency on use of $ in 
different widgets? I often get errors due to guessing wrongly, and 
sometimes these can be data-deleting errors), and I also have a $field 
attribute.

My widget can be found here:
http://ng110.tiddlyspot.com/#%24%3A%2Fng110%2Fwidgets%2Faction-chooserandom.js

and an example of use can be found here:
http://ng110.tiddlyspot.com/#Choose%20Random%20Demo

Cheers,

Neil.



On Sunday, 12 October 2014 11:04:11 UTC+1, Jeremy Ruston wrote:
>
> Hi Philip
>
> Well done, very cool.
>
> I think it can be done without modifying the navigator widget though, by 
> introducing a "randomly choose from filter" action widget:
>
> <$button>
> <$action-chooserandom filter="[is[tiddler]]" 
> tiddler="$:/config/randomtiddler"/>
> <$action-navigate to={{$:/config/randomtiddler}}/>
> Goto random tiddler
> 
>
> Best wishes
>
> Jeremy
>
>
>  

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Jed Carty]

I wrote a widget that lets the example I linked to open random tiddlers 
from dynamically generated lists.

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Jed Carty]

There is an example here that uses a plugin I wrote that does what the 
original poster wanted. Unfortunately you have to manually set the range 
for the random numbers, but other than that it works as expected.

http://inmysocks.tiddlyspot.com/#RandVal%20Plugin

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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Jeremy Ruston]

Hi Jed

> Something that may work for the original question of opening a random
tiddler when a button is pressed, and something that I would like to see if
possible, is a simple RNG that gets called by a message (like the 'throw
the dice' button that can be called by a widget message).

Yes, that sounds right to me. It would make a good plugin.

Best wishes

Jeremy




On Thu, Nov 20, 2014 at 9:50 PM, Jed Carty  wrote:

> Something that may work for the original question of opening a random
> tiddler when a button is pressed, and something that I would like to see if
> possible, is a simple RNG that gets called by a message (like the 'throw
> the dice' button that can be called by a widget message). That way to
> implement the 'open a random tiddler' function you initialize the random
> value into a state tiddler, and then each time you click the button it
> opens a tiddler based on the current value in the tiddler and updates the
> value for the next time. Or updates the value and then opens the tiddler, I
> am not sure how the widget messages are executed so the order may matter.
>
> Some interface like <$button><$action-sendmessage $message='tm-rng'
> $state=<> $range=[lowerEnd, upperEnd]
> $stepsize=someValue/>Generate Values could open interesting
> options for new uses. A parameter that allows you to select the
> distribution would be interesting, but probably outside the current scope
> of TW.
>
>
> On Monday, October 6, 2014 5:37:00 PM UTC-6, Philip Coltharp wrote:
>>
>> I envision a widget defined like so..  a list in side a button like so.
>>  ( Imagine this was put in a tiddler on http://tiddlywiki.com/)
>>
>> <$button to="<$list filter="[tag[Widgets]] pick-at-random="1">">Go To
>> Random Widget Tiddler
>>
>>  *OR*
>>
>> <$button to="">">Go
>> To Random Widget Tiddler
>>
>> The ideal is to get a button to send a user to a tiddler picked at random
>> from a list.
>>
>> I could do this in Classic Tiddlywiki but I want to learn Tiddlywiki5.
>> How might one do this in TW5 differently than in TWC?
>>
>>
>>  --
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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Jed Carty]

Something that may work for the original question of opening a random 
tiddler when a button is pressed, and something that I would like to see if 
possible, is a simple RNG that gets called by a message (like the 'throw 
the dice' button that can be called by a widget message). That way to 
implement the 'open a random tiddler' function you initialize the random 
value into a state tiddler, and then each time you click the button it 
opens a tiddler based on the current value in the tiddler and updates the 
value for the next time. Or updates the value and then opens the tiddler, I 
am not sure how the widget messages are executed so the order may matter.

Some interface like <$button><$action-sendmessage $message='tm-rng' 
$state=<> $range=[lowerEnd, upperEnd] 
$stepsize=someValue/>Generate Values could open interesting 
options for new uses. A parameter that allows you to select the 
distribution would be interesting, but probably outside the current scope 
of TW.

On Monday, October 6, 2014 5:37:00 PM UTC-6, Philip Coltharp wrote:
>
> I envision a widget defined like so..  a list in side a button like so.  ( 
> Imagine this was put in a tiddler on http://tiddlywiki.com/)
>
> <$button to="<$list filter="[tag[Widgets]] pick-at-random="1">">Go To 
> Random Widget Tiddler
>
>  *OR*
>
> <$button to="">">Go 
> To Random Widget Tiddler
>
> The ideal is to get a button to send a user to a tiddler picked at random 
> from a list.
>
> I could do this in Classic Tiddlywiki but I want to learn Tiddlywiki5. 
>  How might one do this in TW5 differently than in TWC?
>
>
>

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Tobias Beer]

>
> The TW core concept is, that basically every keystroke gets saved back to 
> the TW internal store as a draft tiddler. 
> If you switch on the "reflow highlighting" in chrome debug tools, you'll 
> see what's going on with every keystroke.
>
> Draft tiddlers are also saved back to the server if there is one. Saving 
> is done, if you stop typing for some time.
>
> So TW core will update drafts and I'm pretty sure, that's not going to be 
> changed. 
>

And that's a much appreciated feature, for sure. A fool to complain about 
that.

So the balance is somewhere between  vs, 
.
I'm progressively a lefty in this one and only hesitantly conservative 
towards the right side. ;-)

Best wishes, Tobias.

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[PMario]

On Wednesday, November 19, 2014 6:36:58 PM UTC+1, Tobias Beer wrote:
>
> If you don't like drafts in your list you need to add !has[draft.of] to 
>> your filter expression
>>
>
> That's not quite the point, though. The point would be to ask: Do we want 
> tw to update the document with things that we're currently just about 
> editing and not even done with? Here's a *no* to that from my side.
>

The TW core concept is, that basically every keystroke gets saved back to 
the TW internal store as a draft tiddler. 
If you switch on the "reflow highlighting" in chrome debug tools, you'll 
see what's going on with every keystroke.

Draft tiddlers are also saved back to the server if there is one. Saving is 
done, if you stop typing for some time.

So TW core will update drafts and I'm pretty sure, that's not going to be 
changed. 

-m


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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Tobias Beer]

Hi Mario,
 

> If you don't like drafts in your list you need to add !has[draft.of] to 
> your filter expression
>

That's not quite the point, though. The point would be to ask: Do we want 
tw to update the document with things that we're currently just about 
editing and not even done with? Here's a *no* to that from my side.

Best wishes, Tobias. 

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[PMario]

--- OT ---
On Wednesday, November 19, 2014 1:20:24 PM UTC+1, Tobias Beer wrote:
>
> but one thing I find rather confusing is that open draft tiddlers end up 
> directly updating and showing up in lists. While that may have its benefits 
> to see the result before commiting, it adds to the number of not really 
> needed refreshes.
>

There is a convention, that "end user" facing lists should not contain 
shadow and system tiddlers. eg: All, Recent and some other sidebar tabs. So 
the default filter set doesn't contain the $:/ prefixed tiddlers

It turns out, that many <$list...> filters (especially templates) also have 
!has[draft.of] in them. There was a discussion, to change the default 
behaviour of the filter to exclude drafts from standard lists. ... It would 
have meant, to create a big incompatible beta-change, so imo it wasn't 
implemented. 

If you don't like drafts in your list you need to add !has[draft.of] to 
your filter expression

-m


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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Tobias Beer]

>
> a random number generator opens a tiddler, depending on the number, in the 
> story view.
> So with every keystroke you may get a new / different tiddler. 
> While there may be cases where we want that, I'd be confused by this 
> behaviour. 
>

Not sure I fully understand your example but one thing I find rather 
confusing is that open draft tiddlers end up directly updating and showing 
up in lists. While that may have its benefits to see the result before 
commiting, it adds to the number of not really needed refreshes.

Best wishes, Tobias.

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[PMario]

On Wednesday, November 19, 2014 11:45:43 AM UTC+1, Danielo Rodríguez wrote:
>
> I don't see the problem on randomly update the random number. I mean, on 
> any refresh cycle of the wiki.
>

What, if it done with every keystroke? 

eg:
a random number generator opens a tiddler, depending on the number, in the 
story view.
So with every keystroke you may get a new / different tiddler. 
While there may be cases where we want that, I'd be confused by this 
behaviour. 

-m

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Danielo Rodríguez]

I don't see the problem on randomly update the random number. I mean, on 
any refresh cycle of the wiki.

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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Jeremy Ruston]

Hi Tobias

OK, I can only reiterate what I've said above. If you want to do stuff like
that then the current state of the random number needs to be stored in a
tiddler so that it will be available across refreshes. There needs to be a
specific trigger to change the random number (eg starting up, or clicking a
button). What you are asking for is possible, but I don't think the
alternative implementations that you've proposed would not work.

Best wishes

Jeremy.



On Tue, Nov 18, 2014 at 3:20 PM, Tobias Beer  wrote:

> Perhaps it would be helpful if I understood your underlying use case. What
>> are you trying to achieve with random number generation?
>>
>
> There are plenty usecases for outputting a random list of tiddlers
> matching a given filter along with a template...
>
>- show: 10 random unanswered / wrongly answered quiz questions
>- show a random quote
>- show a "Did you know?" section listing interesting content
>- ...
>
> Best wishes, Tobias.
>



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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Tobias Beer]

>
> Perhaps it would be helpful if I understood your underlying use case. What 
> are you trying to achieve with random number generation?
>

There are plenty usecases for outputting a random list of tiddlers matching 
a given filter along with a template...

   - show: 10 random unanswered / wrongly answered quiz questions
   - show a random quote
   - show a "Did you know?" section listing interesting content
   - ...

Best wishes, Tobias.

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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Jeremy Ruston]

Hi Tobias

Just to be clear, a "[random[]]" filter is a dead duck with the current
architecture

> What is the benefit of that over a [random[n]] filter?

That it is possible for it to work! A random filter cannot work.

> First of all, I think there are usecases where a new random set at each
refresh is actually desired.

I don't think so. A refresh cycle can happen at any time, potentially many
times a second.

> Where that is not the case, does the DOM get entirely replaced or are
states preserved upon refresh?

The DOM is selectively updated, with parts of the tree being replaced as
required. It is not possible to store state in the DOM.

> What is important is that each instance of a [random[]] filter or a
filter making use of a random number needs to persist the initial draw
until a page reload.

We can use the stored random number as a seed for generating the numbers
that we need. We can also provide a "throw the dice" button that generates
a new random number.

Perhaps it would be helpful if I understood your underlying use case. What
are you trying to achieve with random number generation?

Best wishes

Jeremy


On Mon, Nov 17, 2014 at 9:37 AM, Tobias Beer  wrote:

> Widgets can be redrawn at any time, if the core detects changes in the
>> tiddler store. So whenever a tiddler, or a section of a tiddler is redrawn
>> and it contains the [random[]] filter, you'll get a new result. But that's
>> not what you want.
>>
>
> Then that means that such a "random state" is required for every instance,
> without the user necessarily being required to specify it. The question of
> whether or not there'd be a *[random[]]* filter seems independent of that
> requirement to me.
>
> Best wishes, Tobias.
>



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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Tobias Beer]

>
> Widgets can be redrawn at any time, if the core detects changes in the 
> tiddler store. So whenever a tiddler, or a section of a tiddler is redrawn 
> and it contains the [random[]] filter, you'll get a new result. But that's 
> not what you want. 
>

Then that means that such a "random state" is required for every instance, 
without the user necessarily being required to specify it. The question of 
whether or not there'd be a *[random[]]* filter seems independent of that 
requirement to me.

Best wishes, Tobias.

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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[PMario]

On Sunday, November 16, 2014 9:40:09 PM UTC+1, Tobias Beer wrote:
>
>  
>>
>> Then we'd add a new filter "choose" that would be used like this:
>> [tag[Widgets]choose{$:/info/random}]
>>
>
> That I really don't get. What is important is that each instance of a 
> *[random[]]* filter or a filter making use of a random number needs to 
> persist the initial draw until a page reload.
>

Widgets can be redrawn at any time, if the core detects changes in the 
tiddler store. So whenever a tiddler, or a section of a tiddler is redrawn 
and it contains the [random[]] filter, you'll get a new result. But that's 
not what you want. 

-m


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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Tobias Beer]

>
> There is a potential issue with this approach. It means that each time the 
> filter is evaluated it might return different results, even if the tiddler 
> store hasn't changed. This is contrary to the expectations of the rest of 
> the system; it means, for example, that content could change unexpectedly 
> whenever there is a refresh cycle. In many situations this might not 
> matter, of course.
>

First of all, I think there are usecases where a new random set at each 
refresh is actually desired. Where that is not the case, does the DOM get 
entirely replaced or are states preserved upon refresh?

A better approach would be to generate a random number and store it in a 
> tiddler, and then use that tiddler value to choose a tiddler to display. 
> That would mean that the entire state of the UI is once more represented by 
> the tiddler store.
>
 

So, in outline, we introduce a tiddler '$:/info/random' that is initialised 
> with a random number at startup. We'd also add a "tm-generate-random" 
> message so that the random value could be regenerated by the user after 
> startup.
>

Doesn't there have to be one random number per filter expression requesting 
it rather than one global random number for all filters to make use of? 
 

> Then we'd add a new filter "choose" that would be used like this:
> [tag[Widgets]choose{$:/info/random}]
>

That I really don't get. What is important is that each instance of a 
*[random[]]* filter or a filter making use of a random number needs to 
persist the initial draw until a page reload.

The action of the 'choose' filter would be to modulo the operand by the 
> number of entries in the current list, and then use the result as an index 
> to choose a value from the current list.
>

As Stephan pointed out, modulo will impinge on randomness.

Best wishes, Tobias.

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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Tobias Beer]

Hi Jeremy,
 

> I think it can be done without modifying the navigator widget though, by 
> introducing a "randomly choose from filter" action widget:
> <$action-chooserandom filter="[is[tiddler]]" tiddler="$:/config/
> randomtiddler"/>
>

What is the benefit of that over a *[random[n]]* filter? Other than a need 
to remember a once drawn random number there isn't really any need to 
specify a random number tiddler, is there? Why would that be something a 
user is concerned with?

Best wishes, Tobias.

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Tobias Beer]

Ok, should have read the whole thread first. ^_^

Best wishes, Tobias.

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Tobias Beer]

Actually, I think the most powerful apporach is a *random *filter.

randomm[n]  — out of the filtered set randomly chose (max) n tids

Best wishes, Tobias.

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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Jeremy Ruston]

Hi Philip

Well done, very cool.

I think it can be done without modifying the navigator widget though, by
introducing a "randomly choose from filter" action widget:

<$button>
<$action-chooserandom filter="[is[tiddler]]"
tiddler="$:/config/randomtiddler"/>
<$action-navigate to={{$:/config/randomtiddler}}/>
Goto random tiddler


Best wishes

Jeremy


On Sat, Oct 11, 2014 at 10:25 PM, Philip Coltharp  wrote:

> So I did it.
>
>
> https://github.com/PhilipColtharp/TiddlyWiki5/commit/bd94f508aa4726bf690446c983c2c0ed66cfb7b8
>
>
>


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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Philip Coltharp]

So I did it. 

https://github.com/PhilipColtharp/TiddlyWiki5/commit/bd94f508aa4726bf690446c983c2c0ed66cfb7b8


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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Jeremy Ruston]

On Thu, Oct 9, 2014 at 3:51 AM, Philip Coltharp 
wrote:

> On Wednesday, October 8, 2014  Jeremy Ruston made the commit
> https://github.com/Jermolene/TiddlyWiki5/commit/0dcf54c3b59ed04645928f0ec4ced647e5a0da7f
> :
>>
>>
>> *in editions/tw5.com/tiddlers/ActionNavigateWidget.tid
>> :*
>>
>> The ''action-navigate'' widget is invisible. Any content within it is
>>> ignored.
>>>
>>
>>
> Euclay's random filter idea will work with this new action widget,
>  because the content is ignored by the "refresh cycle"   correct?
>

No that is not correct. The content of the action-navigate widget is
completely ignored; it won't be rendered or refreshed.

Best wishes

Jeremy





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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Philip Coltharp]

On Wednesday, October 8, 2014  Jeremy Ruston made the commit 
https://github.com/Jermolene/TiddlyWiki5/commit/0dcf54c3b59ed04645928f0ec4ced647e5a0da7f:
>
>
> *in editions/tw5.com/tiddlers/ActionNavigateWidget.tid:*
>
> The ''action-navigate'' widget is invisible. Any content within it is 
>> ignored.
>>
>
>  
Euclay's random filter idea will work with this new action widget,  because 
the content is ignored by the "refresh cycle"   correct?

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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Stephan Hradek]

Am Dienstag, 7. Oktober 2014 13:25:33 UTC+2 schrieb Jeremy Ruston:
>
>
> The action of the 'choose' filter would be to modulo the operand by the 
> number of entries in the current list, and then use the result as an index 
> to choose a value from the current list.
>
 
I propose to have $:/info/random be a number from x with 0 <= x < 1. Then 
do not do a modulo, but multiply $:/info/random with the length of the 
list. The integer part of the result is the index.

If you have modulo, you get unfair distributions. Suppose your numbers 
range from 0 to 99 (so modulo 100). And your list length is 66. The result 
will be that the first 33 elments will be picked with a double the 
probability than the last 33.

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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Philip Coltharp]

I am relatively closer to understanding.  

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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Jeremy Ruston]

Hi Philip

Still a random filter(s) might be used on lists, yes?  One could think of
> four such filters, pick N at random, remove N at random, pick N at random
> with replacement, and randomize .
>

There are some subtle assumptions that filter execution is deterministic
(ie, a given filter string will evaluate to the same list every time it is
executed in the context of the same tiddler store values). For example, the
list widget re-evaluates the filter each time it is refreshed, and detects
changes to the list. If there were a randomising filter operator then the
filter would be deemed to have changed every time, leading to continuous
repeated refreshing of the list widget content.

Best wishes

Jeremy.



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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Philip Coltharp]

Still a random filter(s) might be used on lists, yes?  One could think of 
four such filters, pick N at random, remove N at random, pick N at random 
with replacement, and randomize .

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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Philip Coltharp]

On Tuesday, October 7, 2014 7:25:33 AM UTC-4, Jeremy Ruston wrote:
>
>
> There is a potential issue with this approach. It means that each time the 
> filter is evaluated it might return different results, even if the tiddler 
> store hasn't changed. This is contrary to the expectations of the rest of 
> the system; it means, for example, that content could change unexpectedly 
> whenever there is a refresh cycle. In many situations this might not 
> matter, of course.
>
> A better approach would be to generate a random number and store it in a 
> tiddler, and then use that tiddler value to choose a tiddler to display. 
> That would mean that the entire state of the UI is once more represented by 
> the tiddler store.
>
>
I think I am seeing this, the widget action  gets added to the DOM , 
between the time the widget is added and the widget is activated, changes 
to the store can happen...  


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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Philip Coltharp]

On Tuesday, October 7, 2014 7:25:33 AM UTC-4, Jeremy Ruston wrote:
>
>
> There is a potential issue with this approach. It means that each time the 
> filter is evaluated it might return different results, even if the tiddler 
> store hasn't changed. This is contrary to the expectations of the rest of 
> the system; it means, for example, that content could change unexpectedly 
> whenever there is a refresh cycle. In many situations this might not 
> matter, of course.
>
> A better approach would be to generate a random number and store it in a 
> tiddler, and then use that tiddler value to choose a tiddler to display. 
> That would mean that the entire state of the UI is once more represented by 
> the tiddler store.
>
>
So the filter does not run at the activation of the widget? 

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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Eucaly J]

Hi Jeremy:

The "refresh cycle issue" did come across my mind earlier today.
I will add a warning message on the "random filter".

After reading your suggestion, I will agree that such unexpected change 
would better be user driven -- as a button.
(to issue "tm-generate-random" message, or calling some plugin).

But the scale will somehow larger than "random filter".

I will wait the response from who initiate this thread.


Jeremy Ruston：
>
> Hi Eucaly
>
> Here comes the random filter (to limit to n results), as attached.
>>
>> usage : [tag[Widgets]*random[1]*]
>>
>
> There is a potential issue with this approach. It means that each time the 
> filter is evaluated it might return different results, even if the tiddler 
> store hasn't changed. This is contrary to the expectations of the rest of 
> the system; it means, for example, that content could change unexpectedly 
> whenever there is a refresh cycle. In many situations this might not 
> matter, of course.
>
> A better approach would be to generate a random number and store it in a 
> tiddler, and then use that tiddler value to choose a tiddler to display. 
> That would mean that the entire state of the UI is once more represented by 
> the tiddler store.
>
> So, in outline, we introduce a tiddler '$:/info/random' that is 
> initialised with a random number at startup. We'd also add a 
> "tm-generate-random" message so that the random value could be regenerated 
> by the user after startup.
>
> Then we'd add a new filter "choose" that would be used like this:
>
> [tag[Widgets]choose{$:/info/random}]
>
> The action of the 'choose' filter would be to modulo the operand by the 
> number of entries in the current list, and then use the result as an index 
> to choose a value from the current list.
>
> Best wishes
>
> Jeremy
>
>
>  
>
>>
>>
>>
>> Philip Coltharp：
>>
>>> That's something I wouldn't have thought of.  Thanks
>>
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>
>
>
> -- 
> Jeremy Ruston
> mailto:jeremy...@gmail.com 
>  

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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[PMario]

On Tuesday, October 7, 2014 1:25:33 PM UTC+2, Jeremy Ruston wrote:
>
> Then we'd add a new filter "choose" that would be used like this:
>
> [tag[Widgets]choose{$:/info/random}]
>

If you write the tiddler title to $:/info/random you could use  <$transclude 
tiddler={{$:/info/random!!text}} mode=block>>  or

\define showRandom()
<$transclude tiddler={{$:/info/random!!text}} mode=block>>
\end

<>

-m

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Re: [tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Jeremy Ruston]

Hi Eucaly

Here comes the random filter (to limit to n results), as attached.
>
> usage : [tag[Widgets]*random[1]*]
>

There is a potential issue with this approach. It means that each time the
filter is evaluated it might return different results, even if the tiddler
store hasn't changed. This is contrary to the expectations of the rest of
the system; it means, for example, that content could change unexpectedly
whenever there is a refresh cycle. In many situations this might not
matter, of course.

A better approach would be to generate a random number and store it in a
tiddler, and then use that tiddler value to choose a tiddler to display.
That would mean that the entire state of the UI is once more represented by
the tiddler store.

So, in outline, we introduce a tiddler '$:/info/random' that is initialised
with a random number at startup. We'd also add a "tm-generate-random"
message so that the random value could be regenerated by the user after
startup.

Then we'd add a new filter "choose" that would be used like this:

[tag[Widgets]choose{$:/info/random}]

The action of the 'choose' filter would be to modulo the operand by the
number of entries in the current list, and then use the result as an index
to choose a value from the current list.

Best wishes

Jeremy




>
>
>
> Philip Coltharp：
>
>> That's something I wouldn't have thought of.  Thanks
>
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-- 
Jeremy Ruston
mailto:jeremy.rus...@gmail.com

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Philip Coltharp]

Euclay,
So I'm reading and learning tiddlywiki filter code and its conventions.  I 
just read the code "TiddlyWiki5\core\modules\filters.js" and I believe I've 
started to answer my question.

Thank you for what you have given so far.




On Tuesday, October 7, 2014 6:28:17 AM UTC-4, Philip Coltharp wrote:
>
> is it a list/array of arbitrary objects, indexed by title?
> Is it a list/array of only tiddlers, indexed by title?
>
> The code
> source(function(tiddler,title) {
>  results.push(title);
>  });
>
> is some thing I don't understand well.  What is the name given to the 
> javascript concept used here?, which I suspect is transforming the object 
> source 
> in to another object results
> .
>
>>
>> Philip Coltharp：
>>>
>>> What type of object is source?
>>>
>>>

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Philip Coltharp]

is it a list/array of arbitrary objects, indexed by title?
Is it a list/array of only tiddlers, indexed by title?

The code
source(function(tiddler,title) {
 results.push(title);
 });

is some thing I don't understand well.  What is the name given to the 
javascript concept used here?, which I suspect is transforming the object 
source 
in to another object results
.

On Tuesday, October 7, 2014 6:15:59 AM UTC-4, Eucaly J wrote:
>
> Hi Philip:
>
> Could you explain your question a little further?
>
>
> Philip Coltharp：
>>
>> What type of object is source?
>>
>>

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Eucaly J]

Hi Philip:

Could you explain your question a little further?


Philip Coltharp：
>
> What type of object is source?
>
>

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Philip Coltharp]

What type of object is source?

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Eucaly J]

Here comes the random filter (to limit to n results), as attached.

usage : [tag[Widgets]*random[1]*]


Philip Coltharp：
>
> That's something I wouldn't have thought of.  Thanks

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random.js.tid
Description: Binary data

[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Philip Coltharp]

That's something I wouldn't have thought of.  Thanks

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[tw] Re: [TW5] widget to Goto Ranomized Tiddler

[Eucaly J]

maybe ... to implement a random filter

<$list filter="[tag[Widgets]*random[]*limit[1]]" variable="randomTiddler">
<$button to=<> >Go To Random Widget Tiddler




Philip Coltharp於 2014年10月7日星期二UTC+8上午7時37分00秒寫道：
>
> I envision a widget defined like so..  a list in side a button like so.  ( 
> Imagine this was put in a tiddler on http://tiddlywiki.com/)
>
> <$button to="<$list filter="[tag[Widgets]] pick-at-random="1">">Go To 
> Random Widget Tiddler
>
>  *OR*
>
> <$button to="">">Go 
> To Random Widget Tiddler
>
> The ideal is to get a button to send a user to a tiddler picked at random 
> from a list.
>
> I could do this in Classic Tiddlywiki but I want to learn Tiddlywiki5. 
>  How might one do this in TW5 differently than in TWC?
>
>
>

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