Plain text tables as exported by pandoc look like this:
------ -------
| x | y |
====== =======
| 1 | 4 |
| 2 | 5 |
| 3 | 6 |
------ -------
goal: find such tables and surround them to with "```" in the line before and after the table
```
------ -------
| x | y |
====== =======
| 1 | 4 |
| 2 | 5 |
| 3 | 6 |
------ -------
```
(I escaped the "`" otherwise it marks code block boundaries and ends the just started code block)
I can find the horizontal cell dividers with regex ^\ .*\ $.
...but I suppose I need to find the top and bottom one with a look-aheads and look-behinds to check no further of | which mark borders of the table exist in the next or previous line. But, I can't figure out how. Someone got some ideas?
CodePudding user response：
You can try matching:
\ - \ - \ [\s\S] ?\ - \ - \
then replace with:
`$&`
Explanation - all those plus signs :-)
\ - match a literal
- - match a hyphen - one or more times
\ - match a literal
- - match a hyphen - one or more times
\ - match a literal
[\s\S] ? match any character one or more times (NON greedy = as few as possible) - this includes newlines
\ - match a literal
- - match a hyphen - one or more times
\ - match a literal
- - match a hyphen - one or more times
\ - match a literal
Now replace with the whole match surrounded with back-ticks
Set the global flag to replace all.
CodePudding user response：
You haven't said what programming language you are working with.
The fillowing example works in Python.
Regex Pattern, using flag s include newline in . .
As the header line begins with the beginning of a line ^ and the footer line ends with a line end $ we shouldn't have any problems.
I have forbidden the string - - to avoid capturing 2 tables at a time, with everything in between, if we have 2 tables on the same page.
"^(\ (- \ ) ((?!(- -)).)*\ (- \ ) )$"gms
Substituting with
```\n\1\n```