Hello Thomas,
Okay I understood it is kind of decision making using filter. Seems it is
a very clever code!
I learned a new concept! Macro name can be wrapped in a variable (create
aliases). Thank you Thomas!
By the way I am trying to develop a small and simple to understand extract
macro, I call it "mextract". I use it as a recursive macro, see below:
It displays each results for learning and experimenting purpose. P3 is the
snippet it found.
\define mextract(text start, stop)
<$set name="fulltext"
value=<<__text__>>
>
''fulltext'': <$text text=<<fulltext>> /><br>
<$list variable="p1" filter="[<fulltext>splitbefore[$start$]]">
''p1'': <$text text=<<p1>> /><br>
<$list variable="p2" filter="[<fulltext>removeprefix<p1>]">
''p2'': <$text text=<<p2>> /><br>
<$list variable="p3" filter="[<p2>splitbefore[$stop$]removesuffix[$stop$]]">
''p3'': <span style="color:red;"><$text text=<<p3>> /></span><br>
<$macrocall $name="mextract"
text={{{[<p2>removeprefix<p3>removeprefix[$stop$]]}}}
start=<<__start__>>
stop=<<__stop__>>
/>
</$list>
</$list>
</$list>
</$set>
\end
Now I call it like below to find for example all words in bold face.
<$macrocall $name="mextract"
text={{newTest2!!text}}
start="''"
stop="''">>
/>
Where newTest2 is a sample tiddler to be processed for example to extract
all word in bold or italic.
This is //italic// and //italic2//.
This is ''bold'' and this is ''bold2''
I am here to call it `code` and `code2`.
//Thomas//
You can simple test it on tiddlywiki.com
By the way I am not sure how much recursive macro is recommended in
tiddlywiki and what is its performance effect.
-Mohammad
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