[TW5] Compare macro values

[TonyM]

Folks,

I am looking for the correct filter syntax to compare the macro values <<currentMenu>> and <<currentTiddler>>

If both are the same or if they are not

eg;

<$list filter="filter syntax" variable=name>

 <<currentMenu>> and <<currentTiddler>> are the same

</$list>

<$list filter="filter syntax2" variable=name>

 <<currentMenu>> and <<currentTiddler>> are not the same

</$list>

Further I would like a filter that is always true that reads well

<$list filter="filter syntax3" variable=name>

Allways true with Filter Syntax3

</$list>

In this case different Filter Syntax's will be used, for different results.

Regards

Tony

[TonyM]

While I am at it a filter that is always false would complete the documentation.

I require native tiddlywiki as I am using it in a plugin.

I know Evans formulas can do it, but not in this case.

Thanks
Tony

[TonyM]

Oops,

I think the problem I am having is the two variables somtimes refer to system Tiddlers. Those beginning $:/

Tony

[Mark S.]

Try the following, keeping in mind the variable/macro equivalency.

The first 2 give identical results, but one looks for equality and other for non-equality.

-- Mark

--------------------------------------------

<$vars var1="stuff" var2="stuff2">

<$list filter="[title<var1>prefix<var2>suffix<var2>]" emptyMessage="NOT EQUAL">
EQUAL
</$list>

<$list filter="[title<var1>] [title<var2>] -[title<var1>prefix<var2>suffix<var2>] +[limit[1]]" emptyMessage="EQUAL">
NOT EQUAL
</$list>

<$list filter="[title[I AM ALWAYS TRUE]]">
TRUE
</$list>

</$vars>

[TonyM]

Thanks mark

Much appreciated.

I am building a field in which a filter can be provided that can determine the conditions in which a menu/tiddler will appear.

I think it will be a useful pattern.

Regards
Tony

[TonyM]

To add to marks above here is a never true state, for future readers.

<$list filter="[title[oranges]prefix[apples]suffix[apples]]" emptyMessage="always">>

Apples will never be oranges

</$list>

Regards

Tony

[TonyM]

Mark, et al..

Unfortunately this does not seem to be working for me, even when I eliminate system tiddlers in the variables

for example;

\define showmenu(menutype:"dropdown")
<$vars
menutypeset="$menutype$" 
dropdowntype="dropdown"

inlinetype="inline"
>
<$list filter="[title<menutypeset>prefix<dropdowntype>sufix<dropdowntype>]" variable=null>
Do this when menutypeset = dropdown
</div>
</$list>
</$vars>
\end

On Wednesday, January 24, 2018 at 3:19:06 PM UTC+11, Mark S. wrote:

[Mark S.]

Mis-spelling -- sb "suffix" .

Also, there is a mismatched </div>

Good luck

-- Mark

[TonyM]

Mark, Thanks for spotting that, when you look at something so many times it is hard to notice a single character wrong.

Some kind of syntax checking errors would be helpful.

Regards
Tony