Filter Question: Split on First Occurence

#1

The splitregexp can be used to split on any delimiter!
It has two modifiers: m, and i

The question is how splitregexp can be used to split on first occurrence.

Example: There is a long long text and I want to split on first line! So filter shall returns only two non blank parts: the first line and the rest

<$list filter="[{myTiddler}splitregexp.........]>

</$list>
#2

This is a very stupid but simple solution!

<$vars linebreak="""
""">
<$list filter="[{myTiddler}splitregexp[\n]!is[blank]first[]]    
               [{myTiddler}splitregexp[\n]rest[]join<linebreak>]">

. . . your code goes here . . .
</$list>
</$vars>

Note:

  • its is simple (good)
  • it computes the filter twice (bad)
#3

I remembered your recent discussion on SetWidget which blowed my mind. :exploding_head: This is less simple than yours, but it doesn’t compute the filter twice (I think). Is having both a vars and a set widget worse?

<$vars lbr="""
""" firstsplit="\n{2,}">
<$set name="presplit" filter="[[myTiddler]get[text]splitregexp<firstsplit>!is[blank]]">

<$list filter="[enlist<presplit>first[]] [enlist<presplit>rest[]join<lbr>]" />

</$set>
</$vars>

What do you think?

#4

@sull-vitsy - I think it does not work!

Consider a myTiddler like below

This is first line!

This is second 
This is third!

and this is the last one.

You should get:


This is first line!
[[This is second This third!]] [[and this the last one. ]]

$set wrap each line with space into [[..]]